Bulling ..?

I’ve been having a hard time at school with my friends lately. I thought me and my friend group of a 2 years now where close... they started to not invite me to their parties (even tho I invite them to mines) and they make so mean and random comments at me. Today a girl ( that I thought I was really close with) just said to me out of nowhere “you sure you should be eating that”. Then the others laughed per usual. Lol very funny. Apparently it was a joke. Anyways there’s more but the post is starting to be to long hahah but what should I do. Should I change friend groups. Or ignore it like all the other times