I need held with 2 girls please?

My 8th and 9th grade life has been one strange 2 year life. and once again i need some experienced people to tell me what the hell is going on. ok so this girl i talked about in a previous question who i have like for like 3 years now and who did something pretty messed up to me but im not retelling that story again and plus that was awhile ago so forget it. anyway i like these 2 girls the one I've liked for 3 years knows i like her and even though ive been rejected like 3 times she has continued to flirt with me throughout my entire life. and all of the sudden she like got more serious. before she would bump into me, playfully punch me and stuff but now its her saying "you look nice today" or "I like the way you look" and she start conversations more often and i hate this part but whenever she asks me to do something I turn into a different person and will do whatever she asks. I always tell myself i'm not gonna tell her not now or whatever but as soon as she asks i forget everything and just do it. and she was acting pretty jealous when she found out i liked the other girl. then my friend who we knew she liked he asks her out and she says no at the same time is flirting with me still. She'll do little things like give me a hug always want to give me a high five stuff like that and it keeps winning me over. I really don't wanna say i'm in love with her. I mean I'm not even sure what love feels like i'm only 15 its just something about her. anyway on to the other girl. When i first met her i thought she was cute but didnt think much of it all my buddies were all over her i say back and kept staring at the 1st girl all day. Somewhere along the way i developed some feelings for her. and if u read my previous question u know she knows it or knew it because she is probably unsure by now. i talk to her on occasion. and like the 1st girl i talked about she goes out of her way to do things most people don't do. Every single time we p eachother in the hall way she gives a giant smile and says hi. Her ex boyfriend who now seems to be her best friend now will say sup when he walks by too and me and him have kinda become friends we dont talk about her but more stuff like video games and music. On valentine's day she did something weird she walked up to me and says hi as usual and as usual i say whats goin on and she goes well....and pauses shakes her head like she was mad i guess and goes nevermind and walks away this was definatly the thing that made my feelings for her get serious. So now 2 girls that i cant go 5 minutes without thinking about both might like me they both have reasons that would make me think they dont and reasons i think they do. so my question to you is. do they like me? which one should i go for? what do i say? i just need advice like that...thanks