their relationship goes through good and bad patches.
you fall madly in love with them very quickly.
you become friendly again after a disagreement.
you are attracted to them in a romantic way.
you start a conversation with them in a friendly way because you are attracted to them.
you behave playfully as if you were attracted to each other.
To have a romantic relationship without your partner knowing.
this other person feels physically attracted to them.
you are determined to make life difficult for them.
you like them and become friends immediately.
fancy someone
flirt with someone
hit it off with someone
someone turns someone else on
fall head over heels for somebody
two-time someone
have it in for somebody
make up with someone
have ups and downs
chat someone up