Dang. I'm really sorry that you're feeling this way. Just know one thing. You are not worthless, and you're not a bad person. Do not let others make you feel like crap (believe me, I've been through that) and just keep being you. You WILL be of use on this derriere we call Earth. You WILL lead a good life. If you feel like you stink at life, I'm here. But, what do I know, I'm no Oogway. Anyway, the point I'm trying to make is, you are a good person, you just have been having a rough time. I hope you feel better soon. The second half of the third paragraph is similar to a tough time I went through in 4th grade. I dont wanna get into detail now but if you wanna know, thats absolutely ok with me. Anyway, who am I but a little butthole trying and failing to make someone feel better.