I'm thinking along the same lines as Sara...what do you think would happen if you did more than just a kiss? I'm not sure how you two have been interacting other than the positives you've been reporting on here, but like you said...it's been a year. Maybe a little ice breaking is in order and one is waiting on the other to make the first move.
Just a thought. I wouldn't see where a little more of a move would hamper your DBing. Might be something to try before the Vegas trip to leave her something to think about. Who knows? You might be surprised by her reaction