How can get my bestfriend to do this? (Bicurious)?

I recently found my bestfriend attractive. He's a 15 year old. I don't know why I found him attractive but he is. So anyways I am 15 and we are both in the 9th grade. He's been showing me some signs that he might be gay. He will randomly hug me and talk dirty to me. So how can I get him to do things without ruining our friendship.