Could my friend have Aspergers?

I am worried about the way my friend behaves. I have been friends with him for three years but I am finding it harder and harder to be his friend. first of all he was always giving me a hard time questioning me over things which where pointless and although he knew he had a problem then he couldn't seem to help the way he was acting. He has grown up a little bit since then but still he will talk about inappropriate topics of conversation and make the same jokes again and again even though he knows that I don't like it. This year we were around town on three occasions and he was making racist remarks and laughing about it. But I had told him to shut up as it was making me feel uncomfortable. He said he would stop but then started again it is as if he has no realisation of the effects of his behaviour on others. He also worries alot on issues such as Health, he was talking to me about illness sounding really worried it could happen to him. I had to remind him that we were on a night out and that I did not want to talk about that. I am concerned because I don't consider this to be normal behaviour. He has said to me that he thinks he has OCD but thinks that he doesn't need help. What makes me think it could be aspergers is the fact he cannot consider other peoples point of view and gets very forgetful before coming out.