Boyfriend troubles

My boyfriend and I have been fighting so much lately and he keeps trying to convince me that I'm not pregnant when I know I am. I told him to buy me the tests tonight so I can prove it to him and instead he just disappears off to the bar with his buddies. He goes out almost every other night. And it's a place that I cannot go to so I'm always sitting home alone by myself miserable and lonely and he doesn't care because he's not happy with me anymore since we fight so much lately so he just does his own thing and doesn't care. He tells me to just leave and since I choose to stay it's my fault that I'm sitting here lonely. He wasn't always like this, I just wish he could out the fighting aside and be there for me :-( he's so convinced that I'm not pregnant so that justifies his actions towards me. Idk how to get him to stop this and be mature and be there for me.  I have talked to him numerous times and cried my eyes out and he feels bad but he says I'm just pulling a guilt trip and taking advantage of him. Don't know what to do anymore ? and I'm already stressed as it is, but this causes me so much stress because I love him with all my heart, and I'm afraid to be so stressed and crying all the time because I'm scared that it's bad for the baby