Essentially, I dreamed that the guy I dated who dumped me last year and I had a kid. Only we were broken up, I think. And I had moved or something and he had the kid, and I felt sad and bittersweet and cut off and like I missed them and like my kid didn’t know me. And he seemed happy and like he loved her. And I saw her once, but she didn't seem to realize or get who I was or anything, which made me feel really odd and hurt. And I don’t really remember what happened, just the emotions. And the fact that it was all haunting and disturbing, because we aren’t even friends, I am angry with him in real life, I don’t know why he had the kid with him and not me, it made no sense, and that would never have happened. But the emotions felt really freakishly real. I don’t understand. I feel haunted. Someone please give me an idea what the heck this meant in my head?
My hunch is that the child in your dream may not represent a child; the child could be a symbol of the feelings you had for this guy or for the relationship itself. You may feel like this guy took something important away from you, something you love as much as you would love your own child. The fact that the child doesn't know you or even recognize you could mean that in a way you don't realize, you have begun to move on although you miss him or miss the happiness you had in this relationship. In a sense, you're not quite the same person you were before this experience. Dreams mean different things to different people, so you're probably the only one who can completely work this out for yourself. However, your feelings are often the best key to the interpretation of your dream. You feel confused and upset, not unusual reactions to a breakup.
I think the child represents that you gave and he took in the relationship. He was strenghtened and emotionally confirmed, but you were left with nothing from him.