If you believe in the grey haired asian scientist on the history channel (mostly on the show about the universe) then he explains that we live in a space of infinite parallel universes. He gave examples of how each universe existed with relation to one another. And I shall use your example for you. In this universe you chose not to go to that party for whatever reason. In a seperate universe you chose to go to the party. He then expounds to say that somewhere out there in infinity, there is a universe where you are the president of the united states and another one where you work at burger king, and yet another one where you don’t work at all. This is a belief set that is growing (not by alarming rates I don’t believe) but is gaining popularity. And many of these same people then turn around and say that heaven is an impossibility (ahem mr hawking ahem). Ridiculous u_u