The 40-year-old actor died in a crash after a charity car show in Santa Clarita, California, on Saturday (30.11.13), and his father, Paul William Walker III, has been left devastated by his loss.
Despite his grief, Paul William is thankful he shared a close relationship with the 'Fast And The Furious' star and always told him he loved him.
He explained to Los Angeles' CBS radio station: "I'm just ... glad, that every time I saw him, I told him I loved him. And he would say the same thing to me."
Paul William and his other sons, Caleb and Cody, are devastated by the actor's passing but are grateful for the support of their friends and other family members at this difficult time.
He explained: "You can't beat friends at a time like this. His brothers are all taking it pretty hard."
The late star was concerned about the impact an acting career would have on his relationship with his 15-year-old daughter Meadow - who he had with ex-girlfriend Rebecca McBrain - and confessed his worries to his dad before he passed.
His father explained: "[He told me] I want to take a hiatus, [Meadow] is just 15 and 'I don't have much more time to be with her,' and then boom, he got another movie. He would say, 'I don't know what to do.' His heart was so open. I was proud of him every day of his life."