Can a long distance relationship work for 7 years?

So I'm 14 and he's 17. I'm from Britain and he's from Korea. Basically we can't meet up for 7 years because he needs to go through college and train to get the job he wants, and he'll hardly get any holidays apart from Christmas which is obviously family time. I'm really doubting it though, I don't see how anyone could be in an LDR for 7 years. We videochat and that's the best we can do until we can meet up :/ I don't want to hurt him and we're not actually in an LDR yet but we always talk about it, I do really like him though but distance ruins everything. What do you think? :|