Your boyfriend is in the process of moving out without being very clear about it. The pressure he’s feeling from his boss and from you about getting married, is only pressure because it’s pressing him towards something he doesn’t want to do. If he wanted to marry you, and his boss told him it would be a good idea to marry you, he’d certainly take the advice as encouragement, not pressure.
Pay attention to your boyfriend’s actions, not his words. That way you’ll see he’s backing out of the relationship, and he doesn’t have the grace to do it one fell swoop.
You’ve already asked him over and over if he’s breaking up with you and while his words are confusing, his actions are clearly implying that he is.
You need to be the one to take care of yourself at this point because he’s not doing it. He’s taking care of him. I think you can do better than the situation you’re in, so I would advise hastening that break up, and getting back out there to find Mr. Right.