To be young again.
Okay, just make sure you're keeping your hormones in check, because you need to be focused on your learning-- not worrying about some hot guy (who is busy trying to do his job) who is a decade older than you.
I will say this, overtly flirting can appear obnoxious. Just be yourself.
Scrubs are unattractive but everybody wears them, so no disadvantage there. The confidence, intelligence and good nature you project shine through anything you are required to wear.
If you choose to pursue this, as JustBeachyNurse said, you'd better find out if there is going to be any policy issues that will compromise either of you.
If not, then why don't you just ask him out yourself?
If you think being rejected would make it too embarrassing to work with him again, then don't bother. You have to think about this.
Personally, I think the maturity difference between a 28 year-old man and a 19 year-old girl is vast. Don't put yourself in a position to get hurt.
But #1: keep your head on straight and your eye on the prize... and by that I mean successfully completing nursing school-- not Prince Charming.