Have a business partner who may be taking advantage of me...

My partner in my business, a contractor just by himself, has been dragging his feet on our first couple deals the last 6 months on the excuse that his recent separation from his wife is effecting him mentally. Although, I think it's just an excuse to take advantage of me to use the couple houses we got for him to work on as a place to stay and earn extra money from the couple draws we've gotten so far. 

Hos behavior has been upsetting me more lately with him going a week at a time between getting back to me between messages or calls, being ignored for days at a time. Assuring me were close to getting the next stage done and another draw coming soon. With no proof of that happening or often leading into the next week repeatedly. There's other stuff, but just to give you an idea. 

Wondering if I should take some kind of legal action to get him to work right, otherwise I'm gonna lose my mind. It's been 6 weeks since I've seen any progress or we've had another draw, with the payment a month on the place hitting us now, and I'm not sure how to get him to do some dang work and get this project going again. 

He also is not receptive to getting hired help to get things moving faster, assuming he wants to keep the portion of the draw money all to himself on that regard, but still. 

My money is what's tied up in the house as well, another reason I think he isn't as URGENT as I am with getting the place done and sold. 

Just want some advice on what I could do here? The project is in Pennsylvania, by the way.