yeah, go on the date and keep in mind what your friend has said that you need to work on things. You can't stop being a "5-7 year old" unless you have the chance to grow up in experience. Enjoy yourself and when you feel yourself shutting down to possibilities realize that that is because of your past and it might be uncomfortable for a while but you need to step out past your usual limits. It will become more natural. And ya, maybe go see a councelor and let some things out. But don't cancel your date.

People know a little about everything and alot about nothing.