<human>: Could you distill the essence of the text into 1-3 sentences?

M 18 here. I'm a university student who likes a high school senior F 17. We only see each other in the summer as we live 2 hours apart. We met through a mutual friend a few years ago. It started as infatuation but for me it's more than that. She is not emotional expressive at all. I saw her two weeks ago and we hung out very casually. As she hugs me goodbye, she whispers in my ear "I miss you". The next day she texts me pictures of her in different bikinis asking me which one she should buy. I take this as a sign of interest and try to rekindle my feelings had little success as I felt like I was prying information out of her. I'm here where she lives for the weekend and saw her last night. I didn't make any attempt to flirt as I was exhausted from working earlier and then making the drive over. As I stepped out of the room, my friend was concerned that he had done something wrong that made me step out. She replies and says "It's probably me. I'm over it but I don't think he is." (He referring to me). I don't know where we stand or what to do. Any feedback would be great.
<bot>: On and off infatuation of teenagers. I still have feelings for her. She says shes over it but sends NSFW pictures and says she misses me.