My ex boyfriend broke up with me and is now giving mixed signals?

my ex broke up with me because I went to university and keeps giving me mixed signals.. I've come back from uni for good and I saw him over xmas, I ended up staying round his on a drunken night out and we acted how we always did when we were together, I let him know I wanted to get back together but he said he would give us another go but he cant promise he'll be around after uni as he may move away for a job (fair enough). He then found out I was talking to someone he knew and got angry about it and refuses to see or speak to this new guy now. I went out last weekend and saw my ex, he's very flirty and the girls love him yet i noticed he kept looking at me, he went home before me and then rang me asking if i wanted to go to his so we could talk so i did, yet he made it clear he didn't want to talk about this new guy before I got there. When I arrived at his he then kept saying he needed to know i wasn't just at his because the guy im speaking to wasn't out, he was being very persistent with the question and once i said 'no' (should have been a yes) he then suddenly kissed me, i looked away and walked across the room away from him. The next morning it was all normal and he kept kissing me and cuddling up to me, baring in mind this was bringing up old feelings for me. He kept bringing up girls he'd spoken to etc that night and asked whose house id left a jacket at (a friend whose a boy) wanting to know who the boy was. He also then asked what my friends and family thought of him and made jokes about what we used to do when we were together. He has now gone back to not texting me etc like always and im confused?

Agree. He still likes you but most of his urge is comprised of wanting to show this other bloke which of them is the more attractive and impressive. So rather than challenge him to a punch-up, it's a game of, who can get the girl first... fighting *through* you. He's too immature for a steady relationship, basically, like Susie said. Stick with the new guy or, if you brought him into the picture specifically to keen up your ex, dump both of them and leave yourself available for a new, proper relationship. If you dump both of them and he genuinely DID want to get back together but was going about it the wrong way, that'll leave him having to impress you for no other reason than because he wants you.

some guys just want to break relationships and then move on.he seems like that to me.maybe he is not happy that u are so happy with someone else.watch out... and don't let it affectyour relationship with the other

Dog In Manger syndrome, you mean? Aye, could be that too. His ego disliking how quickly she seemed to have got over him. Could be ALL those elements mixed in together, in fact.