Over the years, I have found that the idea of long-distance relationships elicits strong responses. People tend to either be all for it or completely against it, usually based upon their own experience or that of someone close to them.
I spent three years in a long-distance relationship with a man on another continent. At the time, I was open to the idea of marriage but not actively looking to marry (not sure if that makes sense). Skype didn’t exist yet, so most of our interaction was through instant messaging. Like E_7 said, distance leaves little left to do except dialogue. At first I didn’t think much of the hours we spent conversing, thinking the novelty would eventually wear off and we’d stall at the friendship level. Sixteen months later, we were still at it. We never ran out of things to talk about. So I figured we should probably find a way to meet.
Long story short, we’ve been married for fourteen years.
Just because it worked for us doesn’t mean I would recommend it for everyone, however. Approaching a potential spouse in this manner is not for the risk-averse. The greater the distance, the less control you may have over the situation. If you are easily heartbroken, spooked or frustrated, looking closer to home would probably be more prudent.
In addition to the advice given by other posters, I strongly recommend taking measures to protect yourself. Don’t pursue a long-distance relationship without telling your family and real-life friends about it. The world is full of crazy people and true motives are difficult to judge when people are far from each other, a task made all the more complicated when the heart is invested in the outcome.