English Idioms: Love and Relationships — 10 Expressions You Need to Know
English idioms add color and depth to the language — and no topic has inspired more colorful expressions than love and relationships. From the first rush of falling “head over heels” to the lifelong commitment of going “through thick and thin,” these phrases capture the full emotional spectrum of human connection.
Whether you are a student, a professional, or a passionate language learner, mastering idioms about love and relationships will help you speak more naturally and understand native English speakers far better. In this article, you will learn 10 essential English idioms about love and relationships — complete with their meanings, origins, and real-world example sentences.
By the end, you will have the language tools to talk about romance, friendship, commitment, and heartbreak like a true English speaker. Let’s dive in!
1. Fall Head Over Heels
Signification: To fall suddenly and completely in love with someone — often unexpectedly or intensely.
Origine: This idiom dates back to the 14th century, when the original phrase was “heels over head” — literally describing the sensation of tumbling upside down. Over the centuries, the word order flipped to “head over heels,” keeping the vivid image of being so overwhelmed by love that you lose your balance completely. In modern English, it describes that powerful, all-consuming rush of falling deeply in love.
Example sentences:
- She fell head over heels for her co-worker after just a few weeks of working together.
- It was clear from the way he looked at her that he had fallen head over heels in love.
2. Tie the Knot
Signification: To get married.
Origine: This phrase has roots in ancient wedding customs practiced across many cultures, where couples would literally tie their hands together with rope or cord during the ceremony — a ritual symbolizing their union. This practice, known as handfasting, was common in Celtic, Roman, and Hindu traditions. Today, “tying the knot” is a universal English expression for getting married, regardless of whether any actual rope is involved.
Example sentences:
- After five years of dating, they finally decided to tie the knot in a small beach ceremony.
- My sister is planning to tie the knot next spring — the whole family is excited.
3. Pop the Question
Signification: To ask someone to marry you; to propose marriage.
Origine: The word “pop” in this idiom carries the sense of something sudden and surprising — like a cork popping from a bottle. The phrase became popular in 19th-century Britain, where a marriage proposal was considered a dramatic and momentous occasion. “Popping” the question referred to the heart-stopping moment when a person got down on one knee and surprised their partner with a proposal.
Example sentences:
- He had been nervous for weeks before he finally popped the question at their favorite restaurant.
- She said yes immediately when he popped the question during their vacation in Paris.
4. Wear Your Heart on Your Sleeve
Signification: To openly show your emotions and feelings, without trying to hide them.
Origine: This expression is believed to come from the Middle Ages, when knights would tie a lady’s handkerchief or ribbon around their sleeve during jousting tournaments as a sign of who they were fighting for. Shakespeare used the phrase in Othello (1603), where Iago uses it to describe someone who openly displays their emotions. Over time, it became a widely used idiom for emotional openness and vulnerability.
Example sentences:
- She always wears her heart on her sleeve — you can tell immediately if she’s upset or in love.
- He tends to wear his heart on his sleeve, which makes him easy to read in relationships.
5. Get Along Like a House on Fire
Signification: To get on extremely well with someone; to have an instant, strong connection.
Origine: This unusual expression originated in the 18th century. A house fire spreads quickly, burns intensely, and is impossible to ignore — making it the perfect metaphor for a relationship that catches fire almost instantly and burns brightly. The rapid intensity of the fire is the key image: two people who “get along like a house on fire” develop a friendship or bond at a remarkable speed and with great energy and enthusiasm.
Example sentences:
- My new roommate and I get along like a house on fire — it’s like we’ve been friends for years.
- She introduced me to her colleague and we got along like a house on fire from the very first conversation.
6. Have a Soft Spot for
Signification: To have a special fondness or affection for someone, even if you don’t always show it.
Origine: The word “soft” here suggests tenderness and vulnerability — a contrast to toughness or indifference. The phrase likely evolved from the idea that even the hardest exterior has one soft, vulnerable point. In relationships, this idiom captures the idea of holding someone in a special, tender place in your heart — whether it’s a child, a friend, or a romantic partner you care for deeply.
Example sentences:
- My grandfather always had a soft spot for stray animals — he could never turn one away.
- Even though she tries to act tough, she has a soft spot for her youngest brother.
7. Go Through Thick and Thin
Signification: To support someone through all difficulties and good times — to remain loyal no matter what.
Origine: This idiom has medieval roots, referring literally to traveling through both thick forests (dense, difficult terrain) and thin forests (open, easy terrain). The phrase appeared in Chaucer’s Canterbury Tales in the 14th century and was used in hunting contexts to describe a hound that would follow its quarry through any terrain. Over centuries, it evolved into a powerful metaphor for unwavering loyalty and commitment in relationships.
Example sentences:
- True friends go through thick and thin together, no matter what life throws at them.
- They’ve gone through thick and thin as a couple — job losses, family struggles, and everything in between.
8. Call It Quits
Signification: To decide to end a relationship, partnership, or activity; to stop doing something.
Origine: The word “quits” comes from the Latin “quittus,” meaning “free” or “discharged.” In the context of relationships, calling it quits means declaring that both parties are now equal and free from the bond that once held them together. The phrase became popular in 20th-century American English and is now commonly used to describe the end of romantic relationships, business partnerships, or any ongoing commitment.
Example sentences:
- After years of trying to make it work, they decided to call it quits and part ways amicably.
- The business partners called it quits after realizing they had very different visions for the company.
9. Play the Field
Signification: To date many different people rather than committing to one person.
Origine: This idiom comes from horse racing, where “playing the field” means betting on several different horses rather than one. The strategy spreads risk and keeps options open. Applied to romance, it describes someone who keeps their romantic options open and enjoys dating multiple people at once, rather than settling down with a single partner.
Example sentences:
- After his long relationship ended, he decided to play the field for a while before settling down.
- She’s not looking for anything serious right now — she’s just playing the field and having fun.
10. Be an Item
Signification: To be in a romantic relationship with someone; to be a couple.
Origine: The phrase “be an item” emerged in the 20th century, most likely from entertainment journalism and gossip columns. When two celebrities were spotted together repeatedly, reporters would describe them as a single “item” — a bundled pair of news. The term quickly spread into everyday English as a casual, informal way to describe a couple who are in a romantic relationship.
Example sentences:
- Everyone at the office suspected they were an item long before they officially announced it.
- I heard that Sarah and Tom are an item now — apparently they started dating last month.
How to Remember These Idioms
The best way to remember idioms is to use them in real conversations. Here are a few practical tips for ESL learners:
- Make a personal connection: Think of someone in your life who “wears their heart on their sleeve” or who you “get along with like a house on fire.”
- Write original sentences: Create two or three sentences for each idiom using people or situations from your own life.
- Listen actively: Watch English movies, TV shows, and YouTube videos and listen for these idioms appearing in natural conversation.
- Practice with a partner: Ask a language partner or classmate to quiz you on the meanings and challenge you to use each idiom in a sentence.
Conclusion
These 10 idioms about love and relationships are among the most common expressions you’ll hear in English-speaking countries. From the magical feeling of falling “head over heels” to the lifelong commitment of going “through thick and thin,” each phrase carries centuries of cultural history and deep emotional meaning.
The more you use these expressions, the more natural they will feel. Try using one or two this week in a conversation or in your writing — you might be surprised at how quickly they become part of your vocabulary. For more idioms and English expressions, explore the other articles in this series and watch the video above for even more examples. Happy learning!
FR 
EN 
ZH 
ZH_CN 
KO 
VI 
AR 
ES 
HI 
PT 
BN 
RU 
JA 
TR 
DE 
IT 
PL 
ID 
TH 
FA 
UK 
TL 
HE 
UR 
SW 
RO 
NL 
MS 
TA 
PS 
HU 
EL 
SV 
NB 
NN 
DA 
CS 
SR 
AM