Long distance is tough. But, what's tougher is the fact that you live completely different lives on the opposite edges of the city or country. The stress of dealing with it is unmeasurable. While you'd want to put your best efforts and time into them, there are going to be days when you wouldn't get to communicate at all due to different schedules. You would want to tell them so many things but you wouldn't get the time to talk and that would really suck. You would miss each other but won't be able to see them for days or months and you would have to survive with that even if you don't like it. You would have to adjust according to the situation and understand that it's okay as long as you are together willing to make it work out.