Son says he is gay.?

My 15 yr old son approached my recently. He said he was sorry to disappoint me, but he is gay. He said he thought he was asexual since he had no interest in girls, and his sister asked him if he ever considered guys. He thought about it, and said he liked males more. I said ok. He said that he had no interest in girls, and really no interest in guys sexually, but only interested in being friends with guys. His female friends tend to be a bit masculine. He finds effemenit men unattractive. Feels all women and girls look the same..just like cars. He finds intimacy disgusting and repulsive between man-woman and man-man. I explained to him I love him no matter what, and it does not matter. He told his friends at school and so far has not had anything happen. I told him to focus on school. His sister is telling him he needs to start dating. I told him to go at his own pace, and not worry about it. Focus on school. Any other suggestions?