Big friend drama problems?

iam going to be a freshman this year . My 8th grade year i was bestfriends with these 2 sisters , they were twins . But , their other friends didnt really like me , only a few did . And sometimes theyu would make plans with me then hangout with them , but we were togther like every weekend . So around april i became friends with this girl that they don like . They were friends with her from when they were 5 until like 6th grade ,then alot of stuff happend between them and they stopped being friends. One of the twins that i was really close wit , warned me that she stole from them and always would ditch them. So me and they other girl became friends , she seemed so nice and it seemed lke everything the twins told me wasent true . Ever since me and the girl became friends the twins and I havent been talking or hanging out .A few months later , the girl and me became really good friends. But now that its been a few months , im startin to see what the twins ment , she stole from me , left me all my myself at a carnival , and has been ditching me . Me an one of the twins were talking and now , i miss them so much and i wish i never started being friends with that girl..what should i doo?!