Am I wrong

So I caught off my engagement with my partner of five years. on Friday my partner got off at 11 his usual time and my cousin had picked him up from work because me and her had planned on going out and she live closer to his job than I do and I didn’t wanna pack up all the kids to go get him. He got in. I was already dressed. I told him that I was going out with my cousin for little bit. Why I was upstairs feeding the baby. He was downstairs sitting in the car drinking with her. I did not mind the problem come in to play when Saturday night came around and we were supposed to go out again, but I was extremely tired and being a breast-feeding mom I don’t like drinking a whole lot cause I hate pumping and dumping so he decided that he was going to go out with my cousin I did not mind. I tried calling him around 2 AM. No answer. Try calling him again. again at 3:40 because on his location I seen that he came to the house three different occasions but I was just confused on why he wasn’t in the house if he been there three different times he didn’t answer again 5:40 came at this point I am upset and contemplating on if I need to be looking at my cousin sideways because what are y’all doing at 5 o’clock in the morning with each other so I asked him today what was that all about and he said he don’t feel like he has to answer to me. I am not his mother and all I do is nag and complain him.