Why do u hate me

It's extremely hard being in the house with my child's father and he always seems mad at me. I don't get it I've done nothing to him he talks to me sometimes and then other time she HATES my existence and I try to be nice even when he's an asshole to me I love him dearly and I'm carrying our rainbow baby. Why does this man hate me so much. I'm good to him and his son I've been with him for the last almost 7 years (7 next month) I just tried to make conversation with him and he answers me in a NASTY tone "WHAT" so I'm like hey are you hungry....He snaps at me and says NO. We are both home from work and haven't said 2 words beside me asking him about the food just a second ago it hurts my feelings and if I try to talk to him he's an ass to me and mskes m feel I don't even wanna talk anymore. I hate living like this I rather him say hey I'm seeing someone sinstop trying to talk to me or something anything 
WHY DOES HE HATE ME !!