<human>: I left for Europe 2 days ago for 3 weeks.  This is the first time and longest time I've been away from my girlfriend, and I miss her more than I thought I would.  She's also taking it badly back at home.

Every time I think of her I want to cry.  I don't feel I can have fun sightseeing, but I still am going to try to enjoy it.  I also am trying to get her to be as busy and preoccupied as possible to make the time pass more quickly.

Ya, I'm on the more sensitive/emotional side, so please don't just tell me to just toughen up.  I just want advice for me (and her) on how to make this time easier for us.  What can we do/think to stop feeling this way and stop crying every time we think about each other?

Can you condense the text into a few key points?
<bot>: on vacation away from gf for 3 weeks.  2 days in and can't handle missing gf. Advice?