I'll just add--everyone suggests this is not the right job for me. That's probably right, but I can't leave. I convinced various friends to join the venture telling them what a great group and technology it was--I believed it at the time, oops. I can't just abandon them now. I feel really trapped as a result which probably isn't helping my mental state.
Regarding my SO...I guess he also has his stress. He was apologetic later and has sort of tried to do a little more around the apartment lately, I think sensing that I'm overworked and overwhelmed.