two things. first, what the last poster said.

Second regarding this: "My next step is to email his psychologist with my concerns because I'm certain that he downplays the severity at his appointments."

no. This would be wrong on so many levels. He's hostile already about your mentioning anything to do with getting help so he won't take it well. Second you never should contact anyone's psych (doc or t) without their consent, it's not your business to do so or your place. 3rd, on top of that you've been with him what, 3 months? You aren't even at a level in the relationship that would be a point where even considering to contact his psych would be ok.

After 3 months he is showing hostility toward you, the lack of motivation and possibly ambition.. what is there that would even make it hard to move on?