HELPPPPPPPPPPPPPPPPPPPPP! ADVICE! ill help u back if u ask?

What should I do about my bestfirne? OKay so I have this bestfirend, her name is Bethany and she practically is my only friend, except I used to be in this 'clique' with like 6 girls and I love them, but them bethany came in (Bethany feeds off drama she will do anything to start it, shes learned not to do it to me ANYMORE though) but she has done it before lot, including when I let her hang out with my "clique" once and she started hanging out with them more then me, and then one RANDOM day she got my friends/ "my clique" to hate me for NOO reason, it was a while ago, and I was really upset about it, like I hated Bethany for the longest time, and I ended our friendship for like 3 months, which is a long time considering shes been my bestfriend for 7 years, like I truley love her, and know everything about her and we can share mostly everything with eachother(she shares EVERYTHING with me, but I hold back a bit) and now we're friends again, and she stays ditching me for my old friends "my old clique" like it makes me feel worthless knowing that if it wasnt for Bethany, those parties that my x-clique is going to with Bethany, it would be me, and I feel like my x-clique has replaced me for Bethany aka my bestfriend. it just really upsets me when I'm sitting at home bored, and Bethany texts me and says so what are you doing and then she says I'm with Brittany, Katie, Lauren, & Jess (aka.. MY X CLIQUE) and I guess my anger and jealous is getting in between our friendship.. so please just tell me what I should do? & my old friends, we're resolved everything to the piont where we are striaght, nothing good or bad, even though when I do see them any of them anywahere.. it so akward. especially Jess which I became sooo close to and then Bethany broke us apart. ughh Bethany just pisses me off, but since we've became friends we've stopped arguing. like she thinks its always my fault. cause its true I pick the fights, for the **** I just cant let go off that shes done to me in the past. I dont want to dump her, but if I told her how i felt and that i dont ilke when she hangs out with Jessica and Birttany and them Bethany would prolly just lauhgh. plus now bethany is like my only friend, and I dont want to use the excuse "I dont want to be lonley" to keep Bethany around, and the fact that I've known her for such a long time, but shes not the same person that I started this friendship with, we've both changed and in such different ways. ... help!