I mean... Regardless of what's happening, getting him over such a major speech impediment is so far beyond anything else you typically see. Especially when it's also what seems to have finally got him to do what he is most talented at.
This isn't just "loner get attracted to first girl who says hi to him". Like, regardless of what happens, she got him past a MAJOR issue and helped him find the thing he seems to love doing more than all. She could reject him and still have done far more for him than just about any high school sweetheart you'll ever find.