Have you ever sacrificed being in a relationship for personal goals?

Right now after my breakup with my girlfriend, I am seeing a potential date once again, but I am unsure whether to pursue this woman because of my plans to get my Masters and migrate. I do not want to fall into an embarrassing situation like before. Does that mean I should not date anyone until I succeed, which is not a sure thing? Have any of you guys ever stopped dating for more than a year for a personal goal in your life?