[The Slim Reaper]

I thought you were probably both around 18ish, but if she's 25, then what?

I would suggest it's one of the following things

1 - She used you through lockdown to help pass the time, but now things are getting back to normal she doesn't want the responsibility.

2) She likes you, and by referring to how much time others are noticing you're spending talking, she puts that out there without fear, to test the waters.

3) She's seeing someone else, and (either she or he) doesn't want an ex hanging around

4) There's a massive misunderstanding between the both of you that needs a conversation.

Have you been flirty at all?