Right.
I feel the need to vent/seek help, since my only 3 best friends are either out of state at the moment, or involved in this.
This all started about January of this year. Me and my good buddy are seniors, just doing our thing (track, school play, prom planning, class officers, etc - We're both pretty involved guys hahah). During play practices, we both get really close with a few people, and my buddy ends up having a flirtationship (that might have/might not have gone anywhere) with another girl in the play. I'm excited for him, as his parents are pretty much religious nuts and he doesn't get the chance to date much (which is why he's involved in so much - stay out of the house and all that), and he ends up with his first kiss out of it (pretty big deal for him).
Well, he also ends up liking this other girl that's in other things (student council, yearbook club, etc). Long story short, he decides between them to ask to go to prom and takes the girl that's not in the play. This other girl still kind of likes him still and her being a junior (our prom is a shared one), she got to go to prom by herself and see all this go down (buddy ended up kissing the other girl, etc, etc).
This all happened about a month and a half/a month ago (Prom).
So me and Musical Girl are still kinda of friends. I've seen she's kind of "down in the dumps" lately, since my buddy and his new girl have started that "sort of" dating stage and all, so I've been trying to cheer her up, walking home with her, chatting, generally just trying to keep her mind off it. We've both gotten closer to each other, since we've both got more free time (track season is over for me, friends all have girlfriends, etc). I've started to crush on her a bit, and I think she has on me as well.
Which is a problem.
I kind of feel bad, since pretty much the entire thing is my fault. I told my friend to "go for it," etc, being a good bro, that sort of thing. So, what happened to her is sort of my fault (which is part of the reason I started talking to her more), and I'm not certain how said-friend would be if I started seriously taking to this girl.
I just feel like this is one whole gigantic mess... She's a really cool girl and we get along really well, but I don't know if I could potentially start another really big mess by doing this or not. I don't know what to do >.<