I recently reconnected with a girl on Facebook whom I haven’t seen since college (about 5 years ago). Long story short I saw her walking in the downtown area and not knowing she was back messaged that I had seen her doppelgänger in a joking manner.

I received a message back that it was her and that she wants to meet up when she gets stateside again from a couple month vacation to New Zealand.

What I am asking is for tips to keep some interest on her side going till she returns that would work over online communication.