Im gonna say- if you have been friends for 4yrs and nothing has happened, its probably just a friendship. That may not be the answer you want to hear, but most guys will make a move way before the 4yr mark. Sounds like he is comfortable with you and considers you a good friend, that's where the hanging out and talking a lot is coming from. I've been in the position where a girl likes me and I just consider her a friend, and I've also been the guy that likes the friend. Either way, if your friendship is strong enough, you should be able to talk to him about it- in a way that's not going to ruin your friendship. What I would do, is bring it up casually and just say that you have had some thoughts lately that have confused you, you've always considered him a friend and lately your not sure if your close relationship is just that, a friendship, or if maybe there's more feeling there. If he says yes, I have feelings for you, than you can say "cool me too".. If he says no, than you can say "cool, just wanted to make sure, friends is totally cool with me"..