Colton will be starring in a new Netflix series, Coming Out Colton, which debuts Friday, December 3, and a trailer of the new show was just released on Monday and shows Colton confronting the mistakes of his past.
The Season 23The Bachelor star, 29, says in the footage, "The reason I'm coming out is because I'm ashamed and sort of mortified for what got me to this position in the first place. I put a poor girl through hell of my own insecurities."
Colton's father Scott Underwood tells his son, "She filed a restraining order against you. You went off the rails."
The former football player proceeds to tell his mother Donna, "I was starting to hurt other people outside of just myself."
In another scene, Colton sits down with a spiritual advisor to apparently discuss the guilt he was feeling about hiding his true identity and sexuality for so long.
Colton gave Cassie his final rose on The Bachelor's 23rd season, which filmed in late 2018 and aired in early 2019. The pair dated for about 18 months and discussed getting engaged before announcing their breakup in May 2020.
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What started out as an amicable split turned nasty when Cassie accused Colton of trying to "monetize" their breakup as well as stalking and harassing her, which resulted in Cassie filing a restraining order against the former NFL player in September 2020 followed by a police report several weeks later.
Colton allegedly put a tracking device on Cassie's car, sent her "unsettling" text messages, and would stand outside her apartment or her parents' house very late at night.
Colton later told multiple press outlets Cassie ultimately dropped the restraining order after they were able to reach an agreement in private that addressed Cassie's concerns.
After "hating" himself "for a long time" and trying to convince himself that he was straight for years, Colton revealed he finally accepted his sexuality earlier this year and has never been happier or healthier.
Coming Out Colton is expected to feature Colton's journey before and after announcing he's gay in April -- including how Colton's life changed once he became an out-and-proud gay man.
"I didn't want to be gay, and the main voices in my head were just telling me, 'You'll get through this. You'll get through this,'" Colton, who was raised Catholic and led to believe being gay is a sin, recalls in the trailer for his new Netflix show.
Colton tells a friend, "I never thought I was going to come out. I thought I was going to die with this secret."
Colton later laments to his father in the trailer, "I've backed myself into a corner, running from who I am."
The promo also shows Colton hoping to develop "an emotional connection" with a man for the first time and looking forward to dating as his genuine and authentic self.
After coming out as gay on GMA, Colton revealed to Variety he had experimented sexually with men prior to appearing on Becca's season of The Bachelorette in 2018, which preceded his The Bachelor stint.
Colton disclosed that he had a few sexual encounters with men when he was in his twenties but never had sex with a man or woman prior to his time on The Bachelor franchise.
"When I say 'hookups,' not sex," confirmed Colton, who had met these men under a false name in 2016 or 2017 through Grindr, a gay dating app. "I want to make that very clear that I did not have sex with a man, prior to that."
Colton called himself "a miserable person living as a shell of a human being" while pretending to be straight for well over a decade.
In special GMA footage that aired April 15 on ABC's Nightline, Colton revealed that he hadn't spoken to Cassie "at all" about his decision to come out as gay.
"I don't know if I ever will get the chance to sit down and talk with her. I would like to," Colton said. "I would like to say sorry for how things ended. I messed up. I made a lot of bad choices."
He continued, "I made mistakes at the end of that relationship and I ruined the good memories we had by my actions and what I did to hold on to being straight because I didn't want to look myself in the mirror. So for that, I'm extremely, extremely sorry."
Despite being attracted to men during the course of their relationship, Colton confirmed he was definitely in love with Cassie, which made acknowledging he's gay and his decision to come out to his family and the public even "harder and more confusing" for him.
"If I'm being very honest, I loved everything about her and it's hard for me to articulate what my emotions were in going through that relationship with her because I obviously had an internal fight going on," Colton explained on GMA.
"I would just say that I'm sorry from the bottom of my heart. I'm sorry for the pain and emotional stress I caused. I wish it wouldn't have happened the way it did."
Colton added, "I wish I would have been courageous enough to fix myself before I broke anybody else... Do I regret handling [The Bachelor] the way that I did? I do. I do think I could've handled it better... I just wish I didn't drag people into my own mess of figuring out who I was."
Watch the first official trailer for Coming Out Colton debuting on Netflix below!