At the beginning of his fourth year, I moved four states away so that I could start medical school.Three months in, we mutually agreed to end our relationship.They'll feel better that you're thinking of them when you're apart, you'll get a chance to take a mini break, and it prevents any blow-ups about not hearing from you.
Life in medical school is all about working towards the next quiz/exam/boards.
There are definitely things that the non-medical student can do to help, especially if you live together.
While we had some great years together, ending that relationship needed to happen.
I won't blame it on medical school itself, as we had our problems before my moving, but I would say that overall, medical school changed our relationship.
Talking to some of my (to be honest, male) classmates, it seems that a lot of their partners have a hard time with the fact that they can't always talk when they want to, which is why sometimes a set plan is best.