I fee the same way. I look forward to my days off: "Yay, I can relax! I'll run errands, get things done! I'll get a movie! Cuddle with my cats! Yay!" And then the day/weekend arrives and I sit here feeling like I giant loser. It's good to know I'm not the only one. I don't sit alone all the time, and I need to focus on that fact. And you know what, if I we're busy all the time I would get burned out and then I would withdraw and isolate and wish for all of these endless alone days. So it's kind of damned if I do, damned if I don't. I need to practice more radical acceptance: this is just the way my life is right now.