It's officially been four years to the day since Bob Saget died ... and his former costar and longtime friend John Stamos marked the anniversary of the actor's death by sharing a bunch of photos taken with Saget on his Instagram account on Friday. The photos mostly showed the former "Full House" costars hanging out and spending time with their friends and family ... and we're sure he's got plenty more he's looking over today. John wrote a message about how much he misses Bob, and he compared

Tag-uri: Instagram