"He's not around anymore but I see him," Walker says in a new interview with ET airing Monday. "He's always looking at me. I just see his face."
And time has certainly not lessened the intense grief he still feels.
"They say the first year is the worst, but I miss him more now," he shares. "It's not getting any better for me."
Walker also shared personal photos from Paul's childhood, including this adorable shot of the handsome Fast & Furious star when he was just a baby.
But though Walker shares the same striking blue eyes as his late son, he makes it clear that he's not the one to thank for those unforgettable baby blues.
"He got his blue eyes from God," he says.
"It's one of the darker moments in this, in my journey," Diesel said about still mourning Paul during an August appearance on Live! with Kelly and Michael. "We grew up in the business together, and we became famous together, and we represented the biggest franchise together. He was my partner."
"I've been acting all my life and they don't teach you in acting, how to mourn someone and simultaneously pretend they're in a scene with you," he also said about completing filming for the upcoming Furious 7.
In April, Paul's brothers Caleb and Cody were enlisted to complete scenes in Paul's place for the seventh film in the wildly successful franchise. Furious 7 hits theaters on April 3, 2015.
"He was a fine man," Walker tells ET about what he would like people to remember about his son. "He was the real deal."
Tune in to ET starting Monday for the full interview with Paul Walker III, and never before seen home movies and pictures of his son.