People dont like hanging around a person that sensitive?

I can be sensitive at times too. It sounds like your roommate is a very sarcastic person. She probably has the tendency to hurt other people's feelings. Knowing that, she probably tries to stay away from the sensitive type because she can't keep her own emotions at bay. People like that have their own sensitivities on the inside that you don't know about. Only deal with her when you have to. Don't take anything she says too literally. Just turn a deaf ear to her when you have to.