ENJOY YOUR OWN COMPANY, no youre not a loser if you don't hangout with someone 24/7. No, no one is judging for eating lunch alone. And for god's sake, stop comparing yourself to everyone!! Just love yourself for once, you've worked so hard. Also invest in bitcoin
Go outside and put urself in different situations even if it's dangerous it doesn't matter what is the worst thing that could happen? U die so what at least u won't be in ur 18+ scared to go here and there or communicate with ppl Don't waste ur time on books (in moderation tho) they will only teach u how to get high grades but not how to live.
Be patient let go of this sense of urgency and trust your own judgment, surprisingly enough everyone else is not as great and well adjusted as you think they are.
Don't be afraid on ruining your reputation, just do what you love and be friends with those you wanna be friends with. Nobody cares about a 10 year old that much. They won't remember anyways.
Make more friends. No matter how shy and awkward you are, talk to people, make friends. I can't tell you enough just how much both college life and adulthood sucks without friends. It is sooooooooo boring and unsatisfying without a social life.
If you could give your younger self one piece of advice, what would it be?