<human>: So my fiance (26) and I (23) have been in a relationship for about four years, and while it started out pretty good, it's been on a downward slide for a while. We've had a child together, and that almost feels like it's been the nail in the coffin. We are constantly fighting, and when we aren't I feel such apathy towards him I can't describe it. To be perfectly honest, I think that I'm just trying to hold this together for the sake of my child, and because I'm terrified of the idea of being a single mother. I do love him, but I feel like there's so much damage done to us that it's practically hopeless, and that there are qualities about each other that just can't be compromised on.

I've found myself thinking of the man I dated prior to this relationship. It wasn't a bad one, but distance essentially squashed the whole thing before it began. We were very compatible, but I feel like we just never got a chance to see it through. I find myself missing him so much it hurts. Not even missing him as a significant other, but just as a person, a friend. I desperately want to talk to him some days, but always hold myself back because I feel that this would be opening up a can of worms. I don't know if this is just loneliness or a case of the grass being greener, but it's really screwing with my head. 

I don't know what to do here. I understand that having a child makes our relationship about more than just him and I, but at the same time I'm terrified that I'll stick around and become even more bitter and angry and my child will grow up in that environment. I want him to have his father, I want us to be a happy family, but it all feels like an act. I'm afraid to tell my fiance of these feelings because I know that it will hurt him, that it will be a huge fight, and that it very well could end our relationship.

Could you distill the essence of the text into 1-3 sentences?
<bot>: Unhappy in the relationship, finding myself thinking of an ex, not sure if I'm staying in the relationship for my child or if this is worth working through.