Where do we go from here

I feel like a jenga game. My foundation is being taken away from me piece by piece and it's a matter of time before it all comes crashing down.

I tried to talk to MM last night but he was drunk and I don't think he remembers it now.

I'm trying to put these two separate MMs that I know together in my head.

On the one hand there is the guy I've known for two years who: gave me a toothbrush to keep in his bathroom drawer the first night I slept over which was the first night we had sex; always wanted me to spend the night; has told me the story of being angry with an x girlfriend for continuing to sleep with him and moving on to someone else after they broke up; told me he missed me during a business trip after a month of dating; got jealous when another guy put his arm around me at my birthday party a year ago; has friends who told me that MM loved me before MM did.

Then there's the guy who: didn't want to be called my boyfriend for the first 6 months of dating; talked about his evil X constantly for the first 10 months; told me he was going to New York for New Years, but actually went to Europe; has pictures of this trip with a girl on his computer; has other pictures of them in his current apartment kissing (he has never taken a picture like that with me.); tells me know that when we met he was not ready for a relationship.

In our conversation that he doesn't remember he told me that this isn't a road I want to go down - which tells me that I was right and he was seeing/sleeping with someone else (maybe someone elses) after we started dating. If he didn't do anything, then why would I care? I could handle dating... took someone out to dinner? drinks? a show? Fine, he does that with friends now. But if he fucked somebody while he was seeing me too... that I don't know if I can handle.

He told me that I can pick whatever date has meaning for me and he'll celebrate it as our anniversary. How can I do that? I don't really know when we started being exclusive. I know when I THOUGHT we did, but if he's remembering that time and it includes some other girl(s) then I certainly don't want to celebrate it.

I have been so psyched about having a 2 year anniversary with him. I've never made 2 years with out a break before. But if our relationship is really 2 years old then if was with someone else in that time, he cheated on me.