What's the best way to hint at her?

So Ive been talking to this girl for a few days and I'm REALLY hitting it off well and she's showing me good signs.

She had such a glow up since high school that I didn't even recognize her and I found out yesterday she was my biggest High school crush.

Would it be a decent way to flirt by saying I used to have a crush on her like

"I always thought you were cool, and I also found you really cute when we went to school together" or something along those lines.

I'm not too good with social cues so this is why I'm asking the question. Tysm!!