Awkward situation with a guy

So to cut a long story short, I hooked up with this guy at university who I also went to school with when we were little and he lives a couple of roads away from me. We had a brilliant few days together over the course of a week, and then I messed up and misread his signals and thought he wanted a relationship. Turns out he's pretty determined to stay single and doesn't want to be 'tied down'. So I told him that I understood, and I was happy to carry on seeing him. He was happy to carry on seeing me, or so I thought, 'as long as I'm not leading you on'. So we agreed to carry on seeing each other casually. The next week I tried to make plans with him but things kept coming up for him, but the weekend after that he messaged me asking if I wanted to go to the cinema with him. I was really happy because that meant (obviously) that he wouldn't just be seeing me for sex. But then he said he was going home that weekend. Then he said it had to be postponed until sunday, so it turned out we were both out at the SU on the saturday night. He was with his flatmates so I tapped him on the shoulder and he turned round and smiled and then I bumped into my friends so nothing else happened. The next day he messaged me asking me why I didn't go up to him and say hi, and I explained I thought he wouldn't want me to since he was on a lad's night out.

Then it started to get weird. His flatmate added me on facebook and messaged me telling me to come out for this guy's birthday, which I couldn't anyway because I was ill.
Then the guy started ignoring my BBMs (ie reading them but not replying), or he'd say 'heyy' and then not say anything else. I didn't actually think he was ignoring me deliberately, so one day I sent a BBM saying "hey loser you ready to stop ignoring me yet? :P" as a joke, but embarassingly he didn't reply. So the other day I got a post on my facebook wall from him saying "want to go to the cinema with us tomorrow? we'll meet you there" and I replied saying "yeah sure, what are we seeing?" but then I saw on facebook that it said he was 'in an open relationship' with me and it turns out he'd been 'fraped' by his flatmate...I was so humiliated and I'd been getting excited about going to the cinema with him...again...and I spent most of the day crying. The next morning I BBMd the guy and also tried to phone him but he didn't pick up- because at that point I didn't know that the cinema thing was a frape as well and obviously I had to check what I was doing. Since then I haven't spoken to him at all...his flatmate asked me to go out with them clubbing but I turned him down because I'm not going to show up if the guy doesn't want to talk to me!

So basically we're all back from uni now, and I want to see this guy- casually. I can't see why he'd turn down basically an offer of sex, especially since he can't be busy with uni stuff, and there aren't any other uni girls around. Or if he doesn't even want that, I want to get in contact with him again and at least be mates, and be able to hang out with him and his flat. He's actually a great guy and we used to be friends when we were growing up together. I understand if I freaked him out with the 'relationship' stuff but surely we can move on from that now?? I haven't been in touch with him for a while. I don't know the best way of talking to him- say hi on BBM- so I know if he's read it but it's awful if he doesn't reply- or send him a message on facebook which can be longer but if he doesn't reply I won't know if he's read it or not.
What to do??

I can emphasise, was in that kinda position myself. Probably best to not bother contacting him, all it does is make you feel horrible if he doesnt answer back. Stop making yourself so available, if he doesn't contact you first forget about him. He either isn't interested or he's just rude..either way, stop making the effort!

yeah just give each other some space .. theres no need to continuously try to get in contact with him, if its becoming awkward.

Plus i dont understand why you just haven't gone around and seen each face-to-face.

BUT an occasional hey wouldn't be bad.

I basically just wanted to try once more, put all the cards on the table and say ok, I messed up, can we start again because we had a really nice time.
And then if there was no reply after that, I'd have my answer. I just need to know how to send the message. I could even find out his address but that's way too stalkerish!

I basically just wanted to try once more, put all the cards on the table and say ok, I messed up, can we start again because we had a really nice time.
And then if there was no reply after that, I'd have my answer. I just need to know how to send the message. I could even find out his address but that's way too stalkerish!