They just stopped talking?

I had this group of friends in the beginning of the year, we were close. Then all of a sudden, they just stopped talking to me. If I would like p them or sit with them, they wouldnt talk to me, and they'd make it obvious they didnt want me there. That was only like 5 of them. I was still close with one of them who would still talk to me, now shes stopped too! And if she pes me in the hall or outside or whatever shes like "ew". I have a lot of other friends but now its been like three months since I've ever hung out with them. I just ignore when she says ew. But do you think they all stopped talking to me because there jelous? I dont wanna ask them because I dont want to start an issue. I have done NOTHING wrong to them, no arguments nothing, so the only thing I think it can be is jelousy. Also should I retaliate to that girl that saya those random smart comments?