Watch The Waterboy.
Seriously I am guessing you are a big guy and you are afraid to hurt someone. This is a common problem for guys that have always been the biggest in their class.
EDIT: nvm, Zap if you said that to me 2 years ago then yeah I would completely agree with you but now that most of my friends are my size (or bigger) I don’t find that to be a problem anymore.
Travis I think you’re right. When I get confused and dunno what to do I get thrown off and it’s hard to get your mind straight. I guess some more position specific training would probably help as well.