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Los angeles - Nick Jonas was "jealous" in the early stages of his relationship.
The former Jonas Brothers singer - who has been dating Olivia Culpo for 18 months - admits that it took time for the couple to build up the trust between them.
He told the New York Post's Alexa Magazine: "I think earlier on in my relationship, there were times where I would get jealous."
"I think with time and trust built up, a lot of that went away. We have a really strong relationship now. It takes a second until you feel really locked in with someone."
Meanwhile, the 22-year-old singer also opened up about his "healthy" sex life.
He revealed: "As far as the sexuality goes, I think that just happened for me over time, I think sex is part of a healthy life.
"So I have tried to be, in my transition into adulthood, as honest with myself as possible with sex and sexuality and what it means to me so I can try to be as healthful as I can."
Nick - who wore a purity ring as a teenager - admitted that he doesn't regret the decision.
He said: "I don't regret [wearing a purity ring]. I think that it was an important part of my childhood.
"As I grew up, I sort of figured out what was important to me, my own belief system, which we all grow up, we all live life and find out what's important to us. I am now comfortable with who I am and what I believe in."
