Bd problems

I’ve been having problems with my baby’s dad since she was born going on 5 months. He was a completely different person before she was born ( trying to get all the necessities we would need talking about how much he already loved her) but since I’ve gave birth He barely tends to her needs unless people are around he said it was because I would smother him when he’d hold her and asked me to back off so i did. and he started helping out alot more but that only lasted maybe a week then he was back to his old ways always on his phone barely even acknowledging her existence when i call him out on it, it turns into a huge argument about how I only se the negative he does and how he’s tired of not being appreciated and I’m just baggage I’ve been thinking about breaking it off for a while but I wanted to make it work for our child any advice?