Search Results: sleeping with his best friend

Me and my fiance have been together 4 years, we got together just before we turned 16 and were best friends for 2 years before that. He cheated on me 2 months into the relationship but told me a week later. For a long time I was angry and we had to work at it for almost a year as I couldn't let it go but I'd chosen to forgive him because I love him. The way I was with him was awful and the fact he stayed with me proved to me he loved me. So a year later I found messages to said girl asking for her number and saying I'd moved out. When I confronted him he said he was trying to set her up with his brother, who was a bit down on his luck girl wise and he'd told her I was moving out so she wasn't scared to talk with him, which I believed too as I gave her quite a bit of hell for her sleeping with him and we'd just gotten on good terms. We worked through this, I felt betrayed because it was her but I believed him and we moved on. Things were good for a while but then we started arguing again, he kept saying we should part ways as we were too young to be so serious. But we worked through it once again. After this blip things were great for a long time. Then when I turned 18 I started going on nights out and he got jealous, he broke it off with me so I went out, got drunk, kissed another guy but felt awful about it straight away and told him. We worked through this as well but it was very hard for him. I found messages a few months later to girls after I'd told him that moaning about me and flirting with them. But I also found one to his previous work friend apologising for trying 'it' and thanking her for doing the 'right thing' this was months before any of this had happened so I was shocked. We argued again but after that things were plain sailing and we treated each other well and everything was great, he proposed to me early this year and it's been amazing ever since. So my question is, does this mean he will commit to me now?

So this guy I was sleeping with, he's very closed off from his emotions, and has this confident... cockiness about him, like sort of conceited but not... one day he asked if I had been sleeping with anyone else, and I told him no, and he said he wasn't either. And when I asked if it means we couldn't see where things go with someone else, he asked if I had anyone in mind. And I told him I did.
About 20 minutes later, one of my friends text me, telling me he was talking to her on plenty of fish/facebook. (She knew about me sleeping with him, that's why she contacted me, but he didn't know her and I were friends.)
And while he talks to her, the very first thing he says is, "You know (my name)?" and she goes, "Yeah she's one of my best friends.." She thought it would have been weird if they hooked up, and he says "I've never met you and just because I did something with your best friend doesn't mean it's weird or wrong. She doesn't like me. It isn't wrong."
The only reason he went on P. O. F. is because I told him I was thinking about dating someone else (cuz it seemed like him and I were going no where, but I didn't say that part.) We got into a little argument over it and he said he thought about making whatever we had into a relationship, but then he realized, he really doesn't know much about me or how I feel about him. We've still been sleeping together since..
But the part that gets me is he only says "She doesn't like me"...
If you didn't like a girl would you say "We don't like each other?" Or am I reading to much into this?
Does he at all sound into me, or everything is just to get me to continue to sleep with him while he looks for someone better or something?