up
to end your relationship
to break up or to split up with someone
We decided to break up when he moved to Europe.
We were constantly arguing, so we had to split up.
to date someone
to go out with someone
I have been going out with Harry for 3 months now.
to see someone romantically when you already have a partner
to cheat on someone
He promised he would never cheat on me.
to fall in love with someone
to fall for someone
She fell for him the moment she met him.
to slowly lose your sense of connection
to drift apart
Without spending time or energy on their relationship, they slowly drifted apart
to forgive each other after an argument
to make up
We were arguing about something silly, so decided to make up.
to kiss passionately
to make out
She doesn't want to make out in public.
to let someone believe you are romantically interested in them, but you are not
to lead someone on
George really likes you, you shouldn't lead him on.
to accept something even though it is not exactly what you want
to settle for
Don't settle for him; you could do so much better.
to like each other and get along right away
to hit it off
Wow, they really hit if off! They got along as soon as they met.
to have a fight and not see each other
to fall out
We fell out after he insulted my mother.
Also used as a noun: We had a falling out.
to form a long term, stable relationship with someone
to settle down with someone
They are going to settle down with each other in her hometown.