I did this and here are the things that worked for us
1. when you meet, always have the next trip scheduled to each other (so you wont really say gbye!)
2. have a plan as soon as you can to figure out how to move closer to each other
3. meet every 3-4 weeks (at least) in person
why it is so hard
1. you can kindof share your life, but not really - feels like being stuck in between
2. if there is a time difference it becomes really hard to find intimacy
3. if plans work out, or the other person want to take their time to figure out moving, it becomes very frustrating