Not Sure What To Do

So I've been sleeping with a friend for about 2 months now. He calls us friends with benefits, but I feel more than that. I'm pretty sure we both feel more than just friends that sleep together. We we're having sex, there's so much passion and I mean a LOT. I'm tired of just being his FWB. Neither of us sleep with anyone else, but lately one of my guy friends has sparked an interest in me. My guy friend (let's call him Bob) became really possessive when he found out that I was sleeping with my FWB (let's call him John).  I told John and he got upset about Bob's interest in me. He kept asking me questions and I told him that Bob and I had absolutely nothing between us. Anyway, like a month before I met John, his girlfriend at the time broke up with him. They dated for 10 months. Since then, he refuses to date. He just sleeps with people. He's the first guy to ever have any interest in me, but I'd prefer to be in a relationship. I haven't really talked to him about it and I know I should, but I just don't get why he won't commit! Like I said earlier, there's more to our FWB relationship than he thinks and I know he feels the same, but I feel that he won't commit because of his ex. I sometimes think he still likes her even though he states that he genuinely hates her anytime her name comes up. I feel like she's prettier (and I know that I shouldn't compare myself to her) and he just doesn't want to commit to me because of that. It may or may not be true, but I just kinda need some advice. Sorry this is so long!