I personally think, regardless of how distant two people are, if they are truly dedicated to one another, nothing can truly interfere with the relationship. Some long distant relationships have proven to be rather stable and eventually, long distant relationships often occur. Especially if you have a relationship with someone that lasts towards graduating high school and you two may become separated. If the two have dedication to each other, I'm sure that it'll work out in the end for them.
There is, of course, a lot of stress between the two due to so many things that could happen to one of them and the relationship could of course be ruined. I consider myself to be involved in a long distance relationship, and I constantly wonder what's going to happen. It is, of course, one that started online, so that may prove to be a, as corny as this sounds, heartbreaker or a dream maker.