Search Results: having sex with an ex

So my ex and I hit that 4 month mark. Well after back and forthing with him I decided to completely ignore him. IN Which He Got Angry. 3 or so weeks ago he told me he misses me, our closeness, stability, how we made love and didn't just have sex, and our possible future. We actually connected again and etc . During the 4 months he has been drinking off the wall and having sex with way to many girls. Even tried to with me in which the answer was NO. Well now he's made it very obvious that he is dating a girl who is from his hometown.(thousands of miles and an ocean away). I don't necessarily care if he dates we aren't together. But he has made it clear that he still cares and has feelings for me, but hasn't decided what he wants. He has also made if clear that he feels I guess guilty or embarrassed about how he's acting and the things he's been doing. And that I will love him less because of it. I'm not gonna give you this crap that our relationship was perfect cause it wasn't. But we were in love. Powerful love. I still very much love and adore him and do believe he and I connected on a level like no other. I'm wanting to know a few things. Is he serious about the whole missing me thing or is he just being an a$$? ( he said this on a different occasion then when he asked for sex). Is he just testing the waters (rebounding) with this girl or there no coming back? What generally would be going through a guys mind at this time? Should I completely let go or hold out a little longer?
*We split cause he needed space. And eventually we just broke up. He says didn't want it to be over which he said on multiple occasions

I want to be as specific as possible so you can get the full picture of my situation.

My boyfriend and I have been dating for two months exactly. We see eachother every day. We spend nearly every second of our free time together except when... It's time to go to bed. He tells me he loves me. I want to believe he does. But he has only stayed the night with me twice. Often, most of the time more than once a week, he will even book an extravagant, expensive hotel room... just hang out with me there, sex, hang out some more, drink etc , then leave. Sometimes he is so drunk he can barely walk and he would still rather go home! It is very important for a man to sleep with me, to hold me, make me feel safe, secure and comfortable... I don't understand how a man can be comfortable having sex with me, going down on me etc but not sleeping me. It's very hurtful, and I feel like it's something about me. Like, maybe he doesn't want to be attached to me. Like a psychological issue where he may see this as a larger commitment. Or maybe he is scared it will become a habit. I DON'T KNOW. I am an attractive, slender, 21 year old woman... I can't see why he wouldn't want to sleep with me. Every morning when I wake up I just roll my eyes into the back of my head like... what the hell am I doing? I have never thought that this would ever be any sort of issue.
I have confronted him many times. Told him that this isn't going to work if this carries on. I have told him that it is important to me. It's just like he doesn't care. I've never even been inside or outside of his apartment. But I know he doesn't have a girlfriend bc he's ALWAYS with me.

When I told him last night that I needed an answer right then and there why he won't sleep with me, he said, "The last girl that I slept with was my ex of 7 years"... Which ended about 5 years. (he is 28) I DO KNOW for a FACT that this is a LIE bc he told me about another realationship that he was in for one year and they lived together after 6 months. I confronted him on the lie... he stuck by his lie saying that I had gotten confused (HA I had not) and I didn't say another word bc I didn't want to argue. He doesn't pee the bed, doesn't pass gas while sleeping... so it can't be that. he's not a snorer... Does any one have any input on why this is? And dont say it might be a clingy booty call bc its not like that. I just need to know if I should just leave. What's the deal here guys, really?