Girls, would you consider this funny/cute?

[USMCforlife]

There's this girl in one of my classes who I tease sometimes. I make jokes, talk to her and sometimes I take her phone and say "Are you missing something?" in a playful tone, then give it back. She smiles and laughs about it. I've been trying to think of a way that would be funny to give her my number, so I was thinking this: I ask her to open her phone and let me have it, then put it in and when she asks me what I did I say, "Oh I just added someone to your contacts." What do you guys think about it? Oh and also, one of my friends says she likes me based on what I told him and the tone and way she talks to me. What do you think? She's pretty talkative towards me and she's really nice