Dear Peter,
Without knowing more about you, it's hard to for me to give you some good advice.
But first, I'm sure that you're 1. You said that nobody would care if you left home. What about your 2? And other family members? It seems that you are very 3. You'd better go to see a doctor or talk 4 your parents. They will be able to help you.
Second, I'm sure there is someone else in your class who feels lonely, 5. You never know 6_other people fee. Try to make friends with your classmates. And you could 7a club to meet new people and make friends, too.
You 8 find happiness in yourself. So my 9 advice is to write a list of all the good things about yourself. Learn to like yourself and then 10 will see your confidence and like you, too.
