So this girl broke up with her boyfriend and we got close and she liked me and I wanted to like her but those feelings never came around. We talked about it and she wants to be strictly friends since I wasn't building feelings for her. Time passed and I started to like her as she started to hang out a lot iwth someone else. I began to miss her and feel jealous, I used to always be with her and now she hangs out with someone else, she has no interest in him I am sure, but he may have interest in her. We still talk a lot and I believe she still has feelings for me but she hangs out with him to make me think she doesn't like me anymore. We still hang out and when we're together I just wanna put my arm around her and act like how we were before but I can't, she wants to be just friends. She wants to attend a party next week with the guy and his friends and I feel jealous, what should I do about all of this?