"I can't be what I'm not..."
None of us end up like we thought we would. and not ONE of us hasn't felt like you did tonight at one time or another. It's safe not to take the risk and jump off the cliff and try new things. You'd might be surprised by the results, but will never know unless you go for it.
parties aren't a competiton, they are get togethers so you and everyone else dosen't have to hang out ALONE.