I wasn't expecting you to forget, no, but... [He fumbles the present a little in his hands, thinking about how he wants to put this. He didn't expect her to forget, but he also wasn't expecting a present. Though, just leaving it at that kind of makes it sound like he has a negative opinion of her.] ...thanks.

[Again. He's not sure what else to say, so why not??? Say the same thing twice???]

I dunno about a snack, but I could go for some tea. If you're done here, we can go to a cafe or something.

[And then he can open his present there, once they're sitting down. Because that's a little less awkward than just standing in the middle of an arcade. So, for now, he slips the little box into his pocket.]