[ She wants to go despite her reservations, and him going would only make the experience more enjoyable for her. If only so she could have fun, he'll agree to it. He just has to put up with some rowdy people, that's all. ]

It's just a few people who want to eat food and party. Nothing scary about that.

[ She can just relax. He's certain she'll enjoy it, based on what he knows of her so far. ]

I'll go. Dressed up and all.

[ Now he actually has to get an outfit together, doesn't he? He doesn't really like what he's seen of formal outfits in the mall so far... he might have to make some modifications. ]