Do things together online.

Get on a chat program such as MSN or Skype, turn on webcams if you have them, maybe even microphones? Find a movie online - there are plenty of "watch movies online" type sites. Find an online game you two can play. Of find a computer sharing program such as Teamviewer and have fun fighting for control of each others computers. Just enjoy high interaction and remind each other that you still enjoy being with them!