Mark Twain once said "“I do not fear death. I had been dead for billions and billions of years before I was born, and had not suffered the slightest inconvenience from it.” This sums up rather well how I feel about death, but the idea of nonexistence did used to frighten me. Normally, when people fear death it appears to be because they fear not leaving a legacy or "doing anything" before they die.
So, as people who (presumably) avoid and dislike social interaction/relationships, how do you feel about it?