>>1 so you have some normal lingering feelings of childhood, we all experience it but what you need to realize is that it's the past and people have changed and will continue to change; you've changed as well and it's normal to feel bad about not speaking to people you once knew. But you don't know them anymore, they're different people and they've moved on as well so don't feel so bad about it.
People don't approach not because you're antisocial, it's probably because of your "ice shield" which is absolutely fine! I'm antisocial-gamer-otaku-fujoshi girl too, and trust me, you don't need people to approach you to be happy. You have your hobbies so stick to them, you don't need mean people who only care about popularity as friends, I've had them and it was awful....so do what you love you don't need those kind of people as friends, I'm sure later on in life you'll find someone else that has the same hobbies as you. I hope that helps~! ^^