probably going to get hate, but trying anyway.

My daughters father and i have been trying to work things out. for a few weeks it was wonderful and felt like old times (we broke up when i was 7 weeks pregnant, my daughter is now 4 months old). now every bit of hate i had for him before is coming back. when we dated, he was terrible to me. called me bitch, whore, cunt, etc. he doesn't call me names anymore, he treats me so well. i can't get over the fact that he didn't see his daughter for 6 weeks at one point, and up until 3 weeks ago he had only seen her 8 times. he choose a new girl over her. he fought with me every time i did something as simple as sending him a picture.. i'm jealous of her being around him or his family. i get so angry when i see one of them post a picture of/with her. she's MY baby, i did all of the hard work BY MYSELF. he's only had 3 whole days with her and he's already complained about how needy she is and how she frustrates him. IT MAKES ME SO MAD. i need advice. how do i get through this? do i try to work things out with him? do i just drop it and focus on my daughter? i want her to have a relationship with him, i've always wanted that. it's just so so hard on this momma. help.