PENNSYLVANIA: Will Smith is feeling guilty about James Avery‘s death. The actor wishes he was able to help his Fresh Prince of Bel-Air costar - who ballooned to as much as 300 pounds and died at age 68 on New Year’s Eve of complications from open heart surgery - conquer his weight woes. ‘Will’s devastated right now,’ said a source. ‘He loved James just as if he was a member of his own family.’ Fresh Prince aired on NBC from 1990 to 1996, and Will’s character often needled Avery’s character, wealthy Uncle Phil, about his weight. ‘But off camera, James’ weight was no laughing matter,’ said the source.–SY