Hayden Panettiere allegedly reconnected with her on-again, off-again boyfriend, Brian Hickerson, about two weeks before the actress’ sudden death. A source exclusively claimed to Page Six that Hickerson, 37, was with Panettiere — who died at a Greenville, South Carolina, Airbnb on Sunday at the age of 36 — for about a week in Los Angeles before they made their way east. “He was supposed to leave, but somehow, they ended up on a flight to South Carolina, where he is from,” our insider said. As for the nature of the pair’s relationship, our informant noted that “things did not appear to be romantic” and cited Panettiere’s own comments to…