I am not sexually attracted to my boyfriend anymore

Hi so I am not sexually attracted to my fiance anymore. We have tried different things. He just doesn't ever make me cum. We just had our son 7 months ago. It opens your eyes really. He is so lazy, he acts like an emotional little girl who loves video games. Yes girl, he is so emotional and lazy. And I just can't stand it. I love him, but I am not attracted. He hasn't been a man at all. It's just gross. Tonight he was jerking off and kept asking me to help him while I was trying to go to sleep because our baby was FINALLY asleep in his crib. I am exhausted. I never get good sleep and on top of that I am again, not attracted. But he asked me at least 6 times to jerk him off... I said no every time until the last time. I told him I was leaving and sleeping in another room and he jumped up and told me no stay here. Then wanted to fight with me and tell me "you have been acting like this all night." LIKE WHAT? TIRED?!! I am so frustrated. I am not happy anymore. I keep telling myself couples fight it's normal. But weekly?? At least twice a week if not more we are snapping at each other. I tell myself we will make it through. Maybe I will get these feelings back.. but this has been going on for months.

I think I should leave him, and I broke up with him before well I tried then he said he was going to take our son and he will make sure he knows who split pur family up. I have a part time job, looking for a full time job. I have temporary custody of my brother, and I am trying to get a 2 bed apartment. But can't afford it. I don't know. More than likely I will get custody. It's just that fear.