Most Helpful Guy
After a breakup, people go through a range of emotions. It's a fine line between love and hate after a breakup... as all that passion and feeling you have for the person goes from positive to negative as you feel like they did you wrong, it's natural to get upset about it.
I think he's hot and cold because he still has a thing for you, but after a breakup things can get messy in terms of emotions. I'm kind of going through that with a girl who broke up with me a week ago and have stopped contact. On the one hand I want to really get back with her and share all my thoughts and problems with her, but on the other I also wonder if things are going to work out which make me reluctant to jump back into things with her even if she wanted to.
My advice is to move on for now, he's acted pretty immature and seems to have issues dealing with the breakup. Maybe one day down the road when he's settled down a bit and changed you two can find each other again but he sounds like he is going to just be a rollercoaster of a relationship if you get back with him now