I miss my ex

I have dream about him every once in awhile, I think about him at least once a week. Does this ever end? Its been almost 4 years since we broke up. I just woke up from a very depressing dream about him. I was trying to see why he wouldn't hang out with me and he told me that I had to talk to his girlfriend about it, I met her and then he started doing other things. Odd thing is he doesn't have a girlfriend, hasn't had one for over a year. I realized that he chooses not to see me or talk to me, that no one is stopping him. I think that hurts more than anything.