wheat trout
It sounds like you're feeling hurt and betrayed by the fact that your crush and her friends have been gossiping about you and your feelings. It's completely normal to feel betrayed and hurt when someone you care about talks negatively about you behind your back, especially when they say they were just worried about you.
Have you talked to her or her friends about how their actions have made you feel?
stone sparrow
Girls can be cruel. The problem I see is that you've basically been a doormat for her to walk over because you care so much about her. Relationships are like scales, and yours is tipped way in her favor.
She's definitely known you had a crush on her for years. She probably doesn't reciprocate because you lack confidence and conviction. You could treat yourself as a build-to-suit boyfriend, or you could just be friends with this girl because it sounds like a relationship with her would be a rollar coaster leading in a crash. The types to date trashy guys like you're talking about will become SUPER clingy and start to emotionally dominate you one week in. Dodge the bullet, man...
Like, seriously. Just because she's the only girl you're close with doesn't mean she's actually a good fit for you
I'd recommend exploring some school clubs and seeking out a job to meet some new people and find your romantic partner elsewhere. There are some hot chicks working at Dunkin Donuts
stone sparrow
No problem, I'm sorry that its probably not the answer you were looking for.