Tough Situation

Hey everyone I'm having a hard time with a certain matter. Me, my son, my sons father and his father all live together. My sons father and I aren't married and I'm almost sure we aren't going to be. Right now I'm a stay at home mom and my sons father takes care of the household financially. Of course when since I'm home I maintain the household chores. My sons father and I have not been seeing eye to eye and often have disagreements. I'm lead to believe, because I am the woman I have control over how he reacts to certain situations. For example: Today is my birthday and my bff decided to surprise me with a party. She invited everyone including my boyfriend...we all had an awesome time. Later on that night he decided to take me to dinner. 20 min into being seated, 2 women walk in and his focus is completely off majority of the night. I tried to make light of the situation as usual and try and continue the convo, but his focus was not there still, so I stopped talking. He basically downplayed the situation saying that I was insecure and ungrateful. The convo of course escalated and he cuts me off as usual when he doesn't like something I've said along with telling me to shut up. His father told me it was my fault for excerpting negative energy and I played a part in his reaction and that he was not out of line for what happened because he's a man. All in all I'm battling with the thought of leaving him and staying because I'm in a house doing wifely duties but I'm a girlfriend. I'm constantly crying because it seems as though everything is my fault and I am responsible for him loosing his temperament which leads to him talking to me crazy.... to make matters worse, I'm pregnant again and have no desire to have another child with him. I really need HELP here😞Any advice?