I think my friend is gay and likes me and just scared to say anything. Do you think i should tell him i am gay and see how he responds?
Sure, if you feel comfortable telling him right now. It looks like you are already out to a few people, so you have already made a start on coming out. How do you feel about the idea of your friend being gay and possibly liking you?
If you truly think he is hiding his true feelings or you know something about him then yes tell him. The only reason I would tell you no is because he might reject you or he might be gay but not reciprocate those feelings. But don't let me stop you from coming out to your best friend. He deserves to know regardless.