Thinking of leaving him...😔 please help...

I just recently had a baby. My boyfriend and I have been together for almost 3 years but the last few months have really been hard! We argue constantly and never seem to resolve any issues once they are discussed. He's VERY sensitive and I can be verbally abusive to him at times. He's told me time and time again how he loves me and how he's happy I'm the mother of his son and that he wants to be with me...well I'm feeling opposite at this point. I'm not in love with him anymore, we haven't done anything as a couple in months and since the baby's been here, for me, couple time is out. We live seperately but he comes over daily and spends about 4-5hrs with the baby. I'm at a crossroads right now. I have love for him because he helped give me my son but as far as our relationship goes I feel that it's diminishing right before my eyes. I'm really confused on what to do. He's a great guy but at this point I don't feel he's right for me anymore. I'm not a cheater but I'm thinking of freeing myself and getting back out there once my baby gets a little older. I'm not sure what to do. Any help would be great. Maybe I'm the problem and if so I'd rather leave so that he can be with someone who makes him happy. Any help??