The future of the series is currently in doubt but Lafferty explained that he is grateful for its loyal viewers.
"I don't see how I can thank the fans enough," he told E! Online. "They have always kept us on the air. Without them, One Tree Hill doesn't last one episode, let alone eight seasons. I will always be grateful and look back on my experience with the show as a defining period in my life."
Lafferty also suggested that viewers will be pleased with the season finale and hinted that it will wrap up the storylines in case the show is not renewed.
"I'm actually shooting my last day of the season [this week], so I already know what is happening for Nathan here at the end," he said. "I can tell you that the fans won't be disappointed.
"In the past, we've always had to wait to find out whether or not we would be coming back for another season. We've gotten used to finishing up seasons with an eye on the possibility that it may be our last. I don't think this season is any different."
One Tree Hill returns for a new episode on April 19 on The CW.