I've been divorced for 4 years now and am still not over my ex. We were together for 7 years and married 5?

She had 3 kids before me, but had her tubes tied after that, so we had no kids together. She was the first woman I had ever lived with or had serious relationship with. Things were really good for a while then she got really bossy and wouldn't let me go anywhere but work. If I wanted to get out of the house just to walk the beach for an hour or something it would be a big fight and if I ended up going I would be sleeping on the couch for a week and getting treated very badly. At work they were planning a fishing outing and I asked her about it and she just laughed and said there is no way I am doing that. So I just said **** it I can't do this anymore and we got divorced which was a long 6 month process. I keep thinking I made a mistake and she has gotten remarried since and moved on. I have dated a few times and even lived with a girl for 3 months, but nobody comes close to my ex so I break up with them. I am sick of felling this way, that I had love and I blew it. What can I do, how can I get over her?