I didnt know you felt this way...

But seriously, just be more assertive. Sometimes people tend to have personalities where they feel as if projects are done incorrectly if they're not directly hovering over it. Split up the work to a point that either one of you can look at each other's progress and understand whats going on. Dont be caught with your mouth agape if he suddenly goes MIA and you're left with sole responsibility.

I didn't know you felt this way...

But seriously, just be more assertive. Sometimes people tend to have personalities where they feel as if projects are done incorrectly if they're not directly hovering over it. Split up the work to a point that either one of you can look at each other's progress and understand what's going on. Don't be caught with your mouth agape if he suddenly goes MIA and you're left with the sole responsibility.