<human>: Condense the text into a few key points

A little over a year ago, I ended a relationship with a jealous guy. He was so controlling..always asking me who I was talking to, would get upset if he saw me talking to guy friends on FB who I had known much longer than him, would freak out if I "hugged a guy for too long or talked to a guy for too long," etc.

A mutual friend of ours told me 2 weeks ago he moved to another state with a girl and that they had been together for a year. If that's the case, then he cheated on both of us with each other. However, I don't really think he did, but I can't be sure. Point is, if it isn't true, he's only been with her for maybe 8 months. I have been tearing myself up inside thinking that he's changed with this girl and isn't being so jealous since their relationship has outlasted ours. I can't bear the thought of him being able to trust her more than he did me, as I never cheated or did anything to betray his trust, yet I was still harassed and interrogated constantly. We've been broken up for over a year now and I just can't seem to get over him and think that if he isn't jealous with her, then maybe it was me somehow? Maybe it was my fault he treated me like shit? Maybe there was one small thing I did that made him deem me untrustworthy so that's why he treated me like that during our 6 month relationship and the 8 months after we broke up when were still talking/screwing but still pulled jealous nonsense?

It's been eating me up and I just don't know how to deal with it. I was getting better at getting over him, since i truly thought he was "the one," but hearing that info just made me go back to square one, and I'm scared to death I'm going to be in these looped thoughts that he really was the one, I blew it, and he's turned in to prince charming.

God I need help..
<bot>: Ex has moved on and is with someone else. Sad because I still can't move on and I'm afraid he's treating her better since their relationship has outlasted ours. Need to move on, but can't seem to.