what was the nice item of interest? I wouldn't get too upset over her not responding, I had the same experience recently, running into him at a July 4th party...I sent him a short email: nice to see him, he looked good, etc. if he's ready to get a coffee sometime, but haven't heard from him at all yet! (what do you think?) As for you, don't let her see how much you miss her until you know it's safe. You may want to send her an email or letter, see my latest post on "strategy..." That will be tough since you will run into each other regularly, just hold yourself up high and smile nonchalantly, when you see her and don't ask whose she's been with, it's thinly disguised.
Cheers