Jen,
Dont take it too personal.
All i can say is that i go through the same thing.
You are doing a very good job, he just cant see that right now because he is worried about what he is going through and all the shit he is dealing with...its hard for them to focus on the positive things... Its very hard. And yes, sometimes i just want to give up.
but look at how you are dealing with things! Thats awesome. I say disregard his negativity for the moment and with time he will notice
:-) Continue doing what you are doing so maybe by the end of the year when he is better, he can appreciate how you have picked up the business all on your own!