Thompson - who is known as 'Uncle Poodle' on the show - learned of his positive status in May 2012. He revealed the news of his diagnosis in a recent interview with Fenuxe.
"I knew it had been my boyfriend who infected me," Thompson said. "I later learned he had been HIV positive and was not taking medication and had not bothered to tell me about it.
"I was advised that I should press charges and, hesitantly, I did. It was the right thing to do."
Thompson's ex-boyfriend is currently in prison serving a five-year sentence following his decision to press charges.
"I would have been cool with his HIV status if he had been honest," Thompson added. "I don't have an issue with the disease. I would have known how to protect myself."
Thompson also described anyone who has unsafe sex as "damn fools", adding: "They are playing Russian roulette; they are playing with their lives and [those] of their sexual partners."
Watch a clip from Here Comes Honey Boo Boo below: