My best friend since kindergarten doesn't want to be friends anymore:(?

[Sparkles]

Ok so me and my friend have just entered middle school and I've started hanging out with the "emo" kids and they invited me to go to the library with them before school. When I told my friend about it she said I shouldn't because they will make me do drugs or other shit like that! I didn't listen to her, and now she messaged me on facebook saying that I have changed a lot and we are nothing alike and that we shouldn't be friends! I was heartbroken. We were friends since kindergarten and we told each other everything! Now I'm considered " emo" and my friend hates me what should I do?