What do I do about a troublesome friend??(No stupid answers please)?

I've been through what you're going through. Sad thing is that teenagers are really selfish and don't really care about other people's feelings most of the time. I was once a teenager too who had a bossy, possessive friend. I didn't like to confront her about it either but I would from time to time until eventually I stopped socializing with her. It's just not worth it. People who don't care about how shitty they make you feel or about how they put you down are definitely not worth being friends with (especially when you've confronted them about it before). I know you feel awful about not being friends with her anymore, but trust me, you'll be glad you stopped talking to her. Hopefully this helps. :)