The Rock Cut Ties With Me

"He has had things happen in his life where that incident has affected him in a vastly different way," Logan added.

Johnson has previously opened up about his mother's suicide attempt when he was just 15 years old ... calling for people to look out for and take care of each other.

Logan says he wishes The Rock had reached out to him personally to explain his decision to cut ties ... saying, "I feel like we had a healthy relationship, an open line of communication. I was so sad that my hero wanted nothing to do with me."

"I was sad because I understood it. I really f***ed up."

As for their relationship now, Paul says Johnson recently hit him up via Instagram DM and pretended like nothing…