One of my best friends is a very social guy, to the extent that it's difficult to imagine him being alone in any situation besides sleeping (on the off occasion he isn't getting booty). I can tell he felt pretty dead inside working on my campus over the summer in an office, while all the kids were all on vacation. He basically threw himself in a hole, which caused that deadness inside. I'm a firm believer that everyone should have some kind of activity they can perform while alone, so you can feel like yourself again. Now I know that sounds a lot like "hey he's talking about masturbation LOL!" but really I'm just basing it on my own love for longboarding, which is something I do when I'm feeling down and instantly makes me feel happy and like myself again, even while doing it alone!