FruDawg dude! There's some IOI's here that hint she's somewhat interested dude. Issue here is ya have made it difficult. If ya realised you wanted something an thought she was interested while ya were together you could have pushed it an set up a date if needed.
Assume attraction dude, test for compliance, touch an escalate. If ya can't escalate touch, touch on a high note an set up a date. If she declines ya now know she isn't interested an that's fine. Others are!!
Ya can't go back in time so we have what we have here, drop a message saying it was fun to catch up and you should go out sometime. It would have been better in person but if ya don't bump into each other often needs must! Also this will put ya as leader rather than following her dude