It used to bother me.... and it still does every now and then when I'm in a situation where it's patently clear that everybody's been invited except me. Like in a class last semester, everybody hung out all the time, and they'd just talk constantly about getting together for a party when the course ended. It was super annoying.... not because I wanted to go, per se, but just because it felt like they were intentionally trying to rub it in my face. For the most part, though, I couldn't give a rat's arse.