sometimes this happens, its part of life, i just recently left a friend after years of being friends, it happens. don't put up with bitchy girls and if you feel they are excluding you then move on. don't be too upset about it. you sound young, real friends are there and stay there if they care about you. if you find they are distancing and not treating you the way you feel you should be treated then you need to open yourself up to a larger circle of friends.
Work like you don't need the money. Love like you've never been hurt. Dance like nobody's watching