I've made good friends with foreign people (both male and female) on a number of occassions. I empathise completely with that get home and chat for the first time feeling; you realise, no matter how much you speak online, it's just not going to be the same.
My advice, if you can't meet up as often as you'd like, is stay friends, talk when you can, but don't pin anything on the two of you being an item. Sort of put it at the back of your mind, and let it just settle down to tow people who talk (very hard, but over time, without seeing her, it tends to go that way anyway). Then, in the summer, when she comes over, you two can spend that time doing everything you enjoyed before.
It's a pretty straightforward, and seemingly lame plan, but basicially involves waiting it out, staying close, but not getting too worked up by trying the stress of a long distance official relationship.
Good luck with it whatever you do.