Engaging with people certainly depletes me too. Yet, I also get some of the best feelings about myself by helping others. Which leads me sometimes to overcommitting or feeling guilty when I have to say 'no'. One of the best things about my friendship with BG is that we both had trouble planning ahead to know whether we would have the energy to do things....so we had a mutual understanding about what was a fixed commitment (me giving her a lift to a doc appt) or something we would just pencil in (lunch, hike, firepit, free concert) and neither would get out of shape if the other just was not up for going - no shame, no hurt, no explanation needed.Sounds like how I get when I have to deal with people too much, especially during more depressed times. It sucks.
I do think my housing situation is a current drain, along with the extra load related to my dad, and to some extent Proggy as well. I think it would suit me better if he and I would settle on "just friends"; the current arrangement however is giving me more space and requiring less energy, for which I am grateful.