Is my son gay? What should I do?

I think my son might be gay. For example, yesterday I took him to the movies. When I dropped him off, I drove around and I saw him hugging some guy and when I went to pick him up I saw the same guy hugging him! Also, in the recycle bin of the computer I found a picture of him kissing his friend! He tried to tell me he was gay two years ago when he was 13, but I didn't listen! I'm think of sending him to a camp to cure this awful disease. What do you think?