I dated this guy almost 2 years ago for a year and a half.
I lost my virginity to him and was very innocent. He is a very sexual person, watches porn, looks at naked women A lot, has been with many women... to the point where it seems obsessive. I didn't notice it while I was with him because he was very manipulative and controlling, I always tried to please him not in only sexual terms but by spending all my time with him and buying/ making him things. He seemed very depressed when I tried to break up with him and was scared he might try and hurt himself. Now, two years later, no contact with him at all, I still think about him a lot and I don't want to anymore! Im in a happy , healthy relationship with my best friend and don't want the thoughts. I think about my ex when I drive somewhere we used to go, I see a car that looks like his, even when I'm being physical with my new boyfriend. I don't have any known psychological disorders, but I feel that being with someone who was so controlling and verbally/mentally/ spiritually abusive has done permanent damage on me.
My question is how can I stop thinking about him and completely move on?
Keep in mind I never want to be with him, he's psycho and has tried to blackmail me. He's cussed me out multiple times and put me down to the point that I was depressed.
Help :)

He is a 'bad boy image'. Most women are attracted to this image whether they like it or not; it is the unknown factor. You probably found him exciting to be with when you were with him, now with your present b/f things are not so exciting, rather mundane and you crave the attention of before.

If you live in the same area as you did with him, I can see why it is bothering you; but you have to be strong, don't bend, concentrate on where you are now, and happy to be with someone who is completely normal to have a relationship with.