Help!)))):

My SO and I moved in our first new apartment for about a month now. Ever since we've been arguing non stop! We've been together for 3 years, and we lived together for 4 months (under his parents roof) and we of course had our fights here and there but not as bad as the fights we're having now. I hate it even if it's not my fault I'm always the one at the end crying and apologizing. He rarley ever apologizes and when he does it's always with an attitude. Now he's starting to get rides to work with coworkers (females). Some that I don't even know! He's never done that! Annnnnd now when we fight he always brings up breaking up. Idk what to do? Should I just stick it out? Is it normal to fight like this? Idk I love him so much I want this to work, I just don't know what to do:(