The 'my guy' made me think of Rimuru saying that at one point in the TenSura anime.
Adorable little moment, here. She clearly knows why, based on her happy, sing-songy vibe at the end. Still embarrassed and covering her butt at the very end, while still maintaining the 'cloud nine' vibe.
They're clearly hanging out after-school in her room, considering they're in their uniforms, complete with name tags. This must happen later in the upcoming new school year at some point, but we've kinda already reached a point where I think her parents are okay with them hanging out, just have to get Kyo to a state where he'd go along with her back to her place confidently, which we might be about there, too, on that front.