best friend !!

I've had a guy bestfriend for about 5 years.. we tell eachother everything, we give eachother advice on relationships and all that.. we decided to have sex when we hung out a few weeks ago... we agreed there was obviously no feelings.. "just helping eachother out" but I have gotten complete feelings for him.. I haven't told him because I don't want to ruin our friendship.. he still continues to tell me about girls he wants to go for.. and it's never bothered me more. I want it to be me now, any advice that someone could give me for this situation ?