Maybe it would help to look at it this way: He wouldn't be worthy of you if he thought you weren't good enough.
Or this way: Would you tell your daughter she wasn't good enough for a cute guy?
Just trying to help shift your frame of mind.
In any event, just do it? If you don't, you lose him anyway. You might just find that in the end, he's not all that and a bag of chips, and you wasted energy worrying about him. Or, you might have a really great time. At the very least, it won't be so scary next time!
Started 4/14/08 LINK TO PROGRESS PICS
"It is impossible to live pleasurably without living wisely, well, and justly, and it is impossible to live wisely, well, and justly without living pleasurably" Epicurus