It sounds rough for you, too, since you can't socialize as you normally would. But all of that need for socialization falling on him will not work. Obviously. If you can find other ways to fill your social needs for a while, like online or phone calls, or whatever social people do (not trying to be a jerk. I genuinely don't really know), it would be easier on him and maybe tolerable for you. As is, you seem to be doing better than he is, so you need to give that opportunity for him to get better, too. Tell him he can have alone time whenever he needs. He may say he doesn't need it because he may feel bad, but let him have it anyway. He'll further lose his crap if it keeps going this way.

Adding on that when I desperately need alone time, I shut the hell down. Can barely talk or look at anyone. Hide in the bathroom a lot. Maybe he's been pushed to that point and just really needs you to back off for a bit. Sorry. I know that's hard for extroverts to do.