Why am i feeling like this? -friend bought him and i tix for a concert 2nite, but i don't wana go w/him?

You're probably thinking of the worst things that could probably happen and that you're not gonna be enjoying yourself much. I say, forget about all that, and just go. Don't think about it until the day comes, and I'm sure you'll have a good time there. This is supposed to be a fun evening. Don't ruin it yourself!