Kk so this year I started high school and made two new really good friends. I was kind of happyto get away from my old group of friends, there was just a lot of drama there. One of my old friends even used to copy me a lot, and do everything I did. Recently,the copying friend came in and became friends with them too. I got over it and accepted it. But she like didn't just becomefriend with them... she stole them from me. The three of them always hang out alone now, and never come talk to me... its just getting me mad.
Advice?:)

She sounds like she is retaliating for you ditching her at the beginning of the year. You are the more mature one, accepting her even though she was bound to be jealous and vindictive, so it is going to be lonely for a while until you find some good friends. First year is like this sometimes.
But what about the new friends of yours she took over? Do you think she is saying things about you? Can you talk to them some time when she isn't around and tell your story? Maybe they aren't worth it either.
If you have a half year spot where you can join clubs, try that. You won't be lonely for long.