The late Hayden Panettiere’s on-off boyfriend Brian Hickerson reportedly offered brief public comments one month after the former Heroes star’s shocking death at age 36. Hickerson, 36, was approached by a photographer outside of a gas station in Greenville, South Carolina, on Wednesday, September 16, and was asked how he was holding up, per footage obtained by E! News. “How do you think I’m doing?” Hickerson retorted. When the photographer extended condolences, Hickerson replied, “Appreciate it. That’s all I got for you, man.” Related: Inside Hayden Panettiere's On-Off Relationship With Brian Hickerson In the years after they broke up,…