Its called puberty everyone goes through it, if you don't know already its when your body starts changing and not only does your body but so does the hormones inside you. So because of the hormones you can get really moody and it can be a hard time, but it will pass. It was really hard when I went though it I got depressed by the time I was in 8th grade, but Religion, support of family and friends, music, and sports got me out of the mess. Don't worry about it, you are normal. Its good to think though, you should take out some time and just put it to thinking and then when you get to hang out with your friends you wont want to because you already had.