help (15 F)

I rlly need to vent so like out of nowhere i just got the overwhelming feeling in my chest everyday at school and its like I can't breath and I've been really distant with my friends even though they haven't done anything but like I just cannot talk to them normally for god knows what reason and they're rlly nice ppl and I don't wanna get on their bad side. I've talked to them abt it but they said its fine and that it happens but I feel so bad and they also started distancing themselves frm me also and Idk what to do like they always waited for me after class so we could leave tgt but now they've just been leaving me and whenever I try to enter convos I always get talked over and it just leaves an icky feeling in my chest and on top of that im having problems with my dad which I think kickstarted all my problems and I rlly wanna talk to them abt it but idk how to do that without crying or feeling like im looking for attention. It just feels like im not even there in the group anymore and idk what to do pls help I rlly wanna stay friends with these ppl and it doesn't seem like they hate me. And one more thing theres this one friend who i was close with and now we barely utter more than 3 sentences to each other and I miss my friends and her☹️im also getting the strong urge to start sh again