Bisexual men in relationships with women described difficulties discussing their bisexuality and experiencing stereotypes.
Being in a relationship can counteract the negative effects of bullying faced by individuals of the LGBT community, a study has found.
Lesbian and gay youth showed significantly less psychological distress and were buffered against bullying when they were in a relationship.
Prior research has not found a protective effect like this for support from parents and friends, researchers said.
"Romantic relationships add luster to life," said Brian Mustanski, from the Northwestern University Feinberg School of Medicine in the US.
"Your romantic partner can be the first person you reach out to when you have good news to celebrate or for a shoulder to cry on when you have bad news," said Mustanski.
"Having a partner then can amplify the good things in life and provide critical support during tough times," he said.
While the benefits of being in a romantic relationship to mental health is well documented in adults, limited research has been conducted on the association between dating relationships and mental health in young people.
Even fewer researchers have examined the potential stress-buffering effects of romantic involvement for sexual minority groups.
"There are lot of questions about if and how we should help LGBT teens form romantic relationships, so that they can have the same experiences of dating and learning about relationships as their heterosexual peers," said Sarah Whitton, associate professor at the University of Cincinnati in the US.
"The findings suggest there might be great value in initiatives that could help LGBT youth meet other youth such as citywide 'queer proms,' and engage in healthy learning about dating and romance," said Whitton.
Romantic involvement was associated with higher psychological distress for bisexual individuals, the study showed.
When bisexuals were in relationships, they were 19 per cent more distressed than when they were not in relationships.
When lesbian and gay individuals were in relationships, they were 17 percent less distressed than when they were not in relationships.
"Bisexuals may face unique stressors in relationships," Mustanski said.
In previous research, bisexual women reported their romantic male partners expected threesomes with another female and perceived of the woman's bisexuality as a threat to their own masculinity.
Bisexual men in relationships with women described difficulties discussing their bisexuality and experiencing stereotypes that they are really gay and not bisexual.
Participants came from Project Q2 - the longest running longitudinal study of LGBT (lesbian, gay, bisexual, transgender) youth ever conducted.
Project Q2 is a racially diverse community sample of 248 sexual minority youth between the ages of 16-20, who provided eight waves of data over a five-year period beginning in 2007.
Most participants identified as gay, lesbian, bisexual and/or transgender.