"I haven't gotten past the place where I'm [not] putting a pillow where she was and covering it up," Duane told ET's Kevin Frazier during an intimate sit-down at his Colorado home this week. "And then I wake up in the middle of the night and I see her and it doesn't register that [it] ain't her. I'm still there."
"I wake up to always touch her, especially when she was sick I'd have to wake up a few times when she stopped breathing. I couldn't hear it no more," he recalled. "And she's laying and I'm like, 'You are not dying like that. I will not let you die.' So I'm so used to that that I don't sleep solid anymore."
Dog the Bounty Hunter Holds Emotional Beth Chapman Memorial in Hawaii
Beth's death has also taken a toll on Duane's body, as he revealed he has no appetite and lost "17 pounds in two weeks." "I can't eat. Two bites, I'm full. I got to force feed myself like I force fed her," he admitted.
He also explained that his wife would help him read the menus at restaurants because the lighting would be so dim and he needs glasses -- "I can use those" -- but now he "can't see the freakin' menu."
"I would go, 'What do I want today, honey?' and she would name two things," he explained. "I never ordered…I'm having a hard time ordering food. I've lost 17 pounds. Chewing ice helps, and I've lost 17 pounds in about two weeks."
"People would say I lived a long and great life, sometimes a hard life," he said, explaining that while he has no suicidal thoughts, he's "ready" to join Beth. "Well, of course. I said, 'You beat me to this.'"
For now, he's using his pain to help and connect with others. "I went through experiences to help others -- I really mean this. The other day I met [a guy]. He goes, 'Dog, you know I love you. I'm sorry, I lost my wife six months ago,' and I hugged him and I felt a connection like, boom, instantly brotherhood, right," he shared. "So when you go through something and somebody else [goes through the same thing], there's something there. That's why I'm going through it, but I use that thing that's bad to help me help others."
Tune in to Thursday's ET for more from our exclusive sit-down with Duane. Watch a sneak peek in the video below.