"W, do you have a minute?" (Get her direct attention and most likly direct eye contact). "Have a wounderful time tonight, and don't worry about rushing home. I have everything covered." "By the way, that outfit looks really nice on you"
The sentiment is nice...the delivery is too forced. The "do you have a minute" will likely start her already thinking, "here goes another relationship talk", and the fact that you accentuate this whole encounter by formalizing what you want to say, makes it seem unnatural/fakey.
Personally, I'd forgo the "got a minute" and just say, "that outfit looks nice" very casually, and just say, "have fun" as she walks out the door. I've forgotten....is there someone else?
In the end, it's not the years in your life that count. It's the life in your years. Abraham Lincoln
It is hard to fail, but it is worse never to have tried to succeed. Theodore Roosevelt
