Who do you reunite with in the good place..? [Spirituality & Religion]

My Nana was really religious and said you’d reunite with your spouse in heaven of course and your family. But what if you don’t get married..? Or what if your married multiple times due to deaths or extreme circumstances? Who do you reunite with if you love someone and it was never meant to be here? What if they loved you..? What if you live your spouse and someone else? What happens then..?