Well, you said it yourself, didn't you? You don't want to come off as "a creep", and you're getting all worked up over something so trivial as getting into her personal sphere for completely innocuous reasons...

[A pause. She could just lay it all out on the table for him, but on the other hand... sixteen-year-old boys, man.]

But if it troubles you so, I could always lend a hand. I do quite a bit of tailoring in my own right.