I'm seeing this girl from my Uni and we've been out on a few dates e.g we went out for Lunch and also out for drinks on a Saturday night which ended in a K-Close and her considering to continue the night back at mine. If I see her out and about in Uni or elsewhere around town how can I acknowledge her without just a casual "Hi" or "How's it going" and still convey that I'm attracted to her?

Edit- Grammar