Guy question help please!?

Last friday I went out on a date with a guy. We had a great time, and there's alot of chemistry there. We've actually been friends for 2 years. Well we had on our first date (which is something that I NEVER do. I am strictly a relationship only person.) On Sunday, my roommate and I went to his apartment to hang out and watch the superbowl with his roommates. Well, he asked if I wanted to be "**** buddies" with him. I said yes, and we had again that night. We've had a few more times since then, and we are the only people we are sleeping with. I am starting to have feelings for him I think, and I've noticed that lately when we have , he's been more pionate and sweet during (before it was just well.... *******.) It's now more like love making/ relationship sex and less like what you'd expect from just a call. Could he possibly have feelings for me too? Do any of y'all have experience with this whole "**** buddy" thing? Does it sometimes turn into something more? help please and thanks?