Disappearance

What if a guy you didn't really know but he lived in the same neighborhood and went to the same school suddenly just died. You were forced to go to his funeral with a bunch of crying people but you're indifferent to his death. Your forced to deal with wearing a RIP bracelet by your mom with his name. It sucks. Then a few days later on a fateful night you were really hungry and decided to go to Walmart at 3am and while your there you spot the 'supposedly' deceased neighbor and see him doing fine and buying a pack of donuts. Panic? Call out to him? Or just ignore him?I choose to ignore him but when I tried to ignore him, he walked up to me ,smiles and says " Hey, I'm Alex, want a donut?" What do you do then?