To have a crush on someone
To make up
To be made for each other
To fall for someone
To hit it off
To break up
To ask sby out
To become friendly with someone again after an argument
To begin to feel love for someone
To get along well with someone from the first time that you meet the person
To have strong feelings of love for someone (often for a short time and with no results)
To end a relationship
To ask somebody to go on a date with you
When two people are a perfect match