That's a tough call as I can tell it sounds like she perks up when she's around people but is miserable otherwise. In this case I would think of the miserable hours outweighs the positive interactions it's time. If you sleep 8 hours and work another 8 with no one home to sit with her that's 16 hours out of the day. That's over half the time miserable. This assumes someone sits with her at least 8 hours. I wonder if you could have a cat sitter to sit with her all day and see if she's happy at least 8 hours of the day.