I am about to move to another hemisphere, after the third break-up with my ex alcoholic gf. I questioned the decision in the begining (you know, wherever you there you and your feelings are), but I know it's the right decision for me - albeit a difficult one, not only because moving logistics are short of hellish, but I know I am going to miss my friends and my city very much.
I think in some instances a hit of geographical distance is needed.
Good luck with your decision. You'll know what's best for you, even if it doesn't feel easy and especially if it feels scary. ❤️