What to do about these bitchy friends?

Lol long question! Anyway my friends used to be like that and leave me out ,walk into ther house without inviting me in when i always invite them... one of the shoved me in a shower and switched it on :// anyway what i did is easy just dont talk to them. It may be hard at first but after a while they will start being nice - but don't go in a propper mardy with them :LL good luck! x