Blood is thicker than water
Family relationships are stronger than other relationships.

Bury the hatchet
To make peace and forgive past grievances.

A match made in heaven
A perfect romantic relationship or partnership.

On the same wavelength
To have similar thoughts or opinions with someone.

Two peas in a pod
Two people who are very similar or close.

Tie the knot
To get married.

The apple of my eye
Someone who is cherished above others.

To have an understanding
To have a mutual agreement or bond.

To keep someone at arm's length
To maintain a safe distance in a relationship.

Wear your heart on your sleeve
To openly show your emotions.

Like ships passing in the night
Two people who meet briefly and do not connect.

To break the ice
To initiate conversation in a social setting.

To patch things up
To resolve a conflict and restore a relationship.

Love is blind
When in love, people may overlook faults.

To hit it off
To quickly become friends or have a good relationship.

All is fair in love and war
In love and conflict, anything is permissible.

To know someone inside out
To understand someone very well.

To drift apart
To grow distant in a relationship over time.

To dance around the issue
To avoid addressing a problem directly.

Through thick and thin
To support someone during good and bad times.