What is wrong with me? Can't get him out of my head!?

Ugh. So here is the condensed version. And please no one judge me because trust me, I'm hard enough on myself about this. This guy, I'll call him "Kent," we had mutual feelings for each other but never wound up dating. We were more than friends but it never went beyond that because both of us had come out of bad relationships previously and didn't want to be hurt again, although I really was into him. Looking back on it now it's obvious that we both wanted the same thing we were just too scared, but at the time I just got tired of waiting so I started dating someone else, which really upset him. So over the next couple years it seemed like whenever I was single he was with someone and vice versa so we never had a chance to be together. About two years ago we wound up becoming really close again just as I had started dating someone else. Since I didn't want to hurt my new boyfriend I slowly let Kent and mine's friendship dissolve despite what I really wanted. We had lost touch and he started seeing someone else and eventually wound up getting serious with this girl. A few months ago we started talking again and I just started crying because I realized how much I missed him and I didn't want him to slip away again. (Although I was still dating the same guy and he was with the same girl). He admitted he still had feelings for me as well which made me extremely happy. But then he cut off all contact from me and it hurt so badly. I have never been able to stop thinking about him, even before this. He's the only person I ever think about or ever want. I know I sound crazy or obsessive but it hurts so bad because I feel like we never got a chance. I find myself wanting to try to get in touch with him again just to see if he even still cares but I always stop myself because I'm afraid. I just don't know what to do. I want to either never see or think about him ever again or I will eventually have to try to get a hold of him somehow and I just don't know what to do. I've tried praying about it and waiting it out but he just keeps creeping back into my thoughts and occasionally a dream or two. Any advice would be appreciated, especially if you've had/been in a similar situation.