Should I move on?

Mia

So this guy I really like lead me on and seemed down for a relationship, but I just found out that he doesn’t want one and he’s talking to his on-again-off-again ex.... I really liked him and I really wanted to have something with him. One girl who’s friends with him says I should move on. Another girl who’s known him a little longer says I should still keep hope... what do I do?