The 20-year-old IndyCar driver said Friday he has received counseling this week from a psychologist to deal with the emotions he's felt since his single-car crash at Pocono Raceway set in motion the fluke accident that killed Wilson.
Wilson was struck in the head by a piece of debris from Karam's car that had bounced along the Pocono Raceway surface. The nosecone struck Wilson in the head, and he died Monday, a day later.
The nights have been a struggle.
"For me, right now, the nighttime is the worst, when you are sitting there thinking about things," Karam said. "I've just been trying to not be spending a lot of alone time because that's when I start thinking things.
Karam waffled with whether or not he should attend this weekend's IndyCar season finale at Sonoma Raceway, but decided being at the track and receiving support from the paddock would be the best thing for him. He was never scheduled to race Sunday for Chip Ganassi Racing.
He was able to speak to Wilson's brother, Stefan, who is also a driver, on Sunday night because Karam and Wilson were taken to the same Pennsylvania hospital after the accident.
Karam had his right heel and left wrist evaluated, but was released without any broken bones.
Tony Stewart says he didn't see a young driver standing on a dirt track in upstate New York last year before he struck and killed him.
Stewart says in court papers Friday he didn't realize Kevin Ward Jr. had been walking along the track after a crash at Canandaigua Motorsports Park on Aug. 9, 2014.
Ward's family has filed a lawsuit accusing Stewart of gross negligence,