Reducing contact because my heart just isn't in it.

I don't want to post the details. It may be identifying for anyone who knows the situation and I don't want that for anyone.

I have finally reached a turning point with my parents. They have really shown me where I rank. I think I want to back off a little but I don't want to hurt them either. I just feel my heart isn't in it feeling the way I do right now. I don't want them to visit (they live far away, so that's not something that happens much anyway). On the other hand, I know they aren't getting any younger. I do believe in the saying not to cross oceans for people who won't jump puddles for you though. It really shows what place you have.

Is there a way to gently pull back with as little pain to anyone as possible?