friend problem!!?

my roommate is really judgemental. the other day she was talking about our two other friends are saying how they had ugly make up and clothes and said they wre embarrassing to go out with them because of the way they look. She said this is her frist year she has felt pretty. Shes changed A LOT since last year. I think its good she confident but she seems really into herself. I also walked in on her photoshopping her boyfriend on photoshop because hes face gets to blotchy and red so she was air brushing him. Shes always making fun of people looks and wont talk to people that dress and look bad. but when im talking to a pretty person i know shell barge in introduce herself. she also will grab boys butts including my boyfriends. I think it might be for attention but i really dont get it. why is she like this? I almost feel pressured to always look nice when im around her. I also found out i have all classes with her next year! waht should i do?

Just quit caring what she thinks. And quit hanging around her.

PHOTOSHOP HOW TO CREATE AN ACTION FOR BRUSH POWDER AND MAKE-UP N18