that's one way to see it. But our boy here tried to go adult-like and present her with something more serious. If she likes it in the end, then it's fineKinda weird that he buys her the hair pin and not the tamago-san when she says that's what she wants. Normally you'd expect it to be like "I think this tamago-san is ugly, but I care more about what you want." Maybe that's just my taste though.
The point is that Hiragi is dumb and overthinking what dating is. They're basically dating already now, but labeling the way they are because Hiragi is anxious about the expectations she hasIf you're gonna act like you're dating, what's the point of explicitly keeping it not official? They could've just gone out properly and done all these exact same things. Whenever they actually do commit to it now, there won't be any oomph, it's just gonna be like "ok, cool". So the momentum of the confession arc is just completely undermined.