My boyfriend is dying and my friends act like they don't care?

My boyfriend has stage four melanoma (skin cancer) and the doctor says he has 6-12 months to live. �My friends act like they don't care at all when I want to talk about him. I feel bad bringing it up, because I don't want to annoy them by talking to them about it. I have no one to talk to about it. I don't know what to do right now. It kills me to know that he won't be hear. I don't know how to handle death, I can't bare the thought of losing him. My friends are REALLY bad at making me feel any better. They say the worst things or try to change the subject when really I need someone to talk to. The other day they said "stop talking about him so much". Then they go on talking about their "boyfriend" troubles, or how hot they think a guy is. I don't know who to talk to, I don't know what to do. Not one of them asked me how I felt about it. Not one of them try's to make an effort. What do I do?