Love at first sight
Falling in love with someone the first time you see them.

Head over heels in love
Very much in love with someone.

Puppy love
Young or immature love.

Love is blind
When you love someone, you can't see their faults.

Fall head over heels
To fall deeply and suddenly in love.

Wear your heart on your sleeve
To openly show your feelings, especially love.

The apple of someone's eye
Someone who is very precious to you.

Tie the knot
To get married.

Match made in heaven
A couple who are perfect for each other.

Heart skips a beat
To feel excited or nervous because of love.

Break someone's heart
To cause someone emotional pain, usually by ending a relationship.

Lovebirds
A couple who are obviously very much in love.

To have a crush on someone
To have strong romantic feelings for someone, usually secretly.

Love-hate relationship
A relationship with mixed feelings of love and dislike.

The one that got away
Someone you loved but lost, often with regret.

Wear the trousers
To be the person who controls or makes decisions in a relationship.

On the rocks
A relationship that is experiencing difficulties.

Steal someone's heart
To win someone's love.

Whisper sweet nothings
To say romantic things to someone in a soft voice.

Double date
When two couples go out together on a date.