The 28-year-old frontman said he started questioning his sexuality during his college years, but didn't come out until after he married stylist Kristy Mucci in 2013. The two announced their separation in August.
"I lived in such a group of straight people -- not that anybody was going to be not understanding -- it was just not the time," he said about continuing to date women.
Angelakos still has a lot of love for Mucci, whom he says actually helped him come to terms with his sexuality.
"When I decided to really deal with it head on, which was, I don't know, in June, she was the one who spearheaded it in a way," he revealed. “She said, 'You need to figure out what's going on with your sexuality because you can't hate yourself anymore.'"
"I just wanted so badly to be straight, because I love her so much," he added. "I think that was one of the most painful things when we decided to separate."
To this day, the "Little Secrets" singer calls Mucci "one of the most incredible people."
"I was going through so many difficult questions with girls that when I started dating my wife she just quieted them so much," he said about the start of their relationship. "So she was such a good friend that it became kind of a non-issue. It's always been about putting it off in my head, not consciously."
"When you are teetering on the edge of homosexuality, it's just so much more comfortable to keep going back to what you know because ... I didn't want to deal with other people," he explained.
Angelakos, who's also been open in the past about being diagnosed with bipolar disorder, said it was a "gut feeling" that led him to come out publicly on the podcast.
"It's the same gut feeling I had when I said, OK, I kind of just need to talk to people about the fact that I am. I'm gay," he said. "And that's it. It just has to happen."
Angelakos took to Passion Pit's Twitter on Monday to thank his fans for their messages of support.
"Everything's going to be okay," he initially tweeted, before following it up with, "I've received so many kind and supportive messages today. Thank you for reaching out and being so kind to me."
everything's going to be okay— Passion Pit (@passionpit) November 9, 2015
i've received so many kind and supportive messages today. thank you for reaching out and being so kind to me.— Passion Pit (@passionpit) November 10, 2015
Last month, Ellen DeGeneres reflected on coming out during her appearance on Oprah's Master Class.
"It became bigger than I ever thought it would be. Bigger than I wanted it to be," DeGeneres admitted. "It overshadowed my talent, it overshadowed who I am as a person."