Long distance relationships. Good or bad idea?

Mara • 19. Canadian. Not trying to conceive at this time.
I'm seriously considering beginning a much more serious relationship with a guy that I've been friends with for about 3 years. Issue is that he has dual citizenship and his work has branched out to England. We obviously can't see each other often as we will be a 6 hour flight apart. Should we just stay friends or attempt something more? Thoughts?