Help Me Because Like Idek Anymore

So I'm like really confused at the moment. :help:

So I have a crush on this girl who's in a few of my classes. And like I really like her a lot, but I'm pretty sure she's straight. And I try to convince myself to stop liking her because I know that she's not flirting with me she's being nice and whatever and blah blah this isn't even the point of this post. So anyway, I have this friend who claims she is "65% bisexual". And she kind of looks like/reminds me of the girl I like. But she's like my best friend. And a few weeks ago when she was over at my house I began to realize that I have feelings for her. Or do I? Could this just be that I know I can't have the other girl so I'm liking her as like a "second choice" or "replacement"? I know she probably doesn't feel the same way either, because she has a really big crush on this one guy, I'm really ugly, and I think her girl crush is this other girl I USED to be friends with but now I'm not and I get really frickin jealous when it looks like they're flirting and I want to punch her in the face and omg wtf it wrong with me I'm so confused and I hate myself so much right now please help. :help: :eek: :tears: