Help me stop dreaming about my ex!!!

Ok, I'm pissed..lol For the past couple of months, I've had dreams about my ex and it's frustrating me. Basically we weren't together long but how we broke up wasn't fun (whose is?). But all the dreams are the same like the one I had last night..

It first started with my at my childhood home and he had called me, acting all casual like nothing happened. I was like, "Why are you calling me, you jerk?". I had no intensions of talking to him. Well, whatever he said worked because the next part of the dream I was at my grandmother's house and we ended up having sex. Then my cousin (who lives with my grandmother) was in her room and I brought him there and introduced him as "my boyfriend"..she had on lipstick and looked like she was going out, she just smirked and left the room and that was it..All the dreams I have with him in it, I'm at my childhood home or at my current home or at my grandmother's home and we end up having sex, but after the sex there's nothing else..either I wake up or he just dissapears..and I'm not hung up on him I think he's a jerk and I want to forget about him but these dreams keep on coming back and I hate it! Please help!!

They'll go away eventually.