Martin Blackwell, 48, carried out the sickening attack on Marquez Tolbert and Anthony Gooden because he did not approve of their relationship.
Today, a jury in Atlanta, US, found him guilty on 10 counts after a they spent just 90 minutes deliberating the case.
Blackwell showed no emotion as he was jailed for 40 years.
Mr Tolbert and Mr Gooden were at home together on February 12 when Blackwell broke in to their house and poured hot water all over their bodies.
Mr Marquez, 21, suffered severe burns to his face, neck, arms and back that required skin graft surgery.
His 23-year-old boyfriend's burns were so extreme across his entire face and 60% of his body that he was put in an induced coma and has just been released from hospital.
"The pain doesn't let you sleep. It's like excruciating, 24 hours a day and it doesn't go anywhere. It doesn't dial down or anything. It's just there," Mr Marquez said on Atlanta's WSB-TV.
"You wake up in the middle of the night, you just cry because you want to sleep and you can't."
The attack was committed by Blackwell, who was Mr Gooden's mum's boyfriend.
"After they were burned, their attacker forced them out of the home, showing no remorse," she said.
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