I am Lost.

i am 22 and I can't seem to come out. I don't know what to do. I am a college student who works part time and still live at home with my parents. They both have made it very clear that they hate gays and are disgusted by them. I don't want to hurt them by revealing the fact that I am gay. My mom is the worst when she speaks about gays, she says the most hurtful things about them and it hurts me sometimes. At what point do I tell them? I am lost at this point. What should I do? I don't know what will happen if I tell them.