I think I'm going crazy.?

Ugh, alright so... a year ago I dated this guy Cody long distance. He lived next to my relatives and was friends with my cousin and that's how we met, and we began a relationship through facebook/texting/calling/webcam. I don't know what was wrong with me at the time but I was on a new birth control and my temper was crazy. I went to visit him for the first time, and I blew it. I picked fights for no reason, I wanted to get pregnant to make him stay with me and when he said we don't need that to stay together I got so pissed and screamed and hit him... it was bad. I eventually got off the pills when I got home, and his family HATED me. Said I was insane, and it couldn't be the pills. He took me back, and broke up with me. Took me back again, and broke up with me over text. He turned into an asshole, and then I wrote a long message of why he's a piece of **** and how he's a jobless loser. Anyway, he made his facebook unprivate recently and looking at his pics (I know I sound stalkerish, and I am when it comes to ex bfs I'll admit) I kind of miss him and wish I didn't blow it. He wasn't the sharpest tool in the shed but not everyones perfect. He made me feel loved when things weren't crazy... he was funny and we had a lot in common... and similar goals. I was thinking of apologizing to him, just to make amends. We both said a lot of messed up stuff to each other, especially me... and I don't want him to think I'm a psycho for forever. By the way, even though I told him the birth control pills were making me sick he wanted me to stay on em just so he wouldn't have to wear a condom. But anyway, I just feel bad about how we ended things. From being best friends, to being enemies. Should I just let it go and stop thinking about it or send him a message with an apology?