I treated myself to a new outfit today in honor of a day I've never liked all that much. There is always so much pressure to go out, "have fun" and to live up to other people's ideas of what we should be doing. Even in a college I can remember notes on my whiteboard from other kids in my dorm telling me how I was "no fun." I wasn't born with the fun gene, and you can't change genetics.
Life as an introvert is not always easy. I'm happiest when I'm cozy at home. It took me a long time to be ok with that, and to not feel like a loser because of it. So if you're home- alone- asleep- "uncool"- "no fun"- I'm with you. Don't apologize for one second. Do what feels best. Be you. And never apologize for it.