Deadsouls I haven't read through every post (I have a busy toddler keeping me from Mumsnetting and rightly so. Ha ha!).
I FEEL your experience. I am 43 now, married, 3 kids and I swear I still have my 'pinch me' moments when I think how lucky I am to have ended up with a really 'normal' husband... someone I can actually read and get! At least when we argue even, it all makes some sort of sense.
At the age of 27, I became involved with a narcissist/sociopath. It was one of these physical relationships that slipped into a proper relationship. Red flags were there which was why I didn't really want it to develop into anything serious. But it did, sadly. The thing that I found so messy was his inability to feel, to care, and his capacity for being such a d*ck to me, YET he could charm the fecking birds off the trees and then some. He was not an oil painting to say the least, yet women were totally taken in by him. Not to sound vain but I had, before him and after, much lovelier men in my life, men worth lining up for, and yet this nutter was the one I had to watch. I seriously couldn't believe how women would throw themselves at him. He had the whole, "I'm a bit of a geezer, lovely, nice guy" schtick going on. "I'm nice. I'll look after ya. I'm not a looker, but I'll spoil you." I left that relationship trampled. EVERYTHING was turned around onto me. Everything was my fault. I didn't know whether I was coming or going. All I know is that I felt so horrible, so guilty for things I never said, never did. He would always go into a pathetic, can't live without you mode to win me back when he felt me slipping away from his grasp. He was so mean behind closed doors, so very cold, and as twisted as the relationship was, it was also incredibly boring because it just revolved around dysfunction and misery. There was no future, no fun. We didn't go out and enjoy each other's company. We would go out and he would sit there, eyes narrow, darting around the room, disengaged... unless we were in a group. Then he was 'funny guy Dean. Mr. Joke a minute'. Everything would always end in tears and misery. He was so 'nice and charming' but at the same time, he resented everyone and everything. He hated people. He stalked me for months after we broke up.
Before we broke up though, he did the weirdest thing. He had to work in Los Angeles, where I am originally from. He made it a point of looking up my family members whom he had never met (apart from one of my brothers who came to visit me in London). He ended up having Easter dinner with my entire family and charming the pants off of them. In confidence he told my other brother (who had not met him prior to the America trip) that I was violent and beating him!! My brother stopped speaking to me for a few weeks when he learned I was this 'horrible, violent woman'. I was so upset... to this day this has marked me. My brother and I recovered quickly. But I couldn't believe that a guy he didn't know could win him over, make him believe every word he said and that I, his sister, someone he has known and trusted his whole life could, in an instant, could become persona non grata on account of blatant lies told by, in effect, a stranger. It was a real nadir for me. The whole relationship remains a dark blob on my personal timeline. This boyfriend was a poison dwarf. When I asked my brother why on earth he believed this joker over me, his own sister who never ever displayed a violent streak, my brother simply said, "Because I couldn't believe someone would lie like that. Why would a person lie and make up such horrible stories about someone?" We were raised to be too nice, which is why I think I attracted this a**hole in the first place. My family and I still talk about this boyfriend. He scarred all of us. His stalking was awful for me, for my family, my friends even refer to it to this day. Just awful. The vengeance...
Get therapy. It is worth it. These guys get inside your mind like a worm that breeds. They are head f*cks to the maximum.