Dameyon Bonson formed 'Black Rainbow' in 2013, the first nation-wide support suicide prevention and mental health support service for Indigenous LGBTI people.
The 43-year-old said there was little support for Aboriginal and Torres Strait Islander people who identified as lesbian, gay, bisexual, transgender, queer or intersex, and their experiences were largely ignored in the public debate.
Mr Bonson said the ongoing political to-and-fro about same sex marriage sent the LGBTI community the message that they did not deserve equality and the right to marry the person they loved.
"We don't want to see more of our kids, our sons, our daughters, our brothers, our sisters, our nieces, our nephews, our granddaughters and our grandsons killing themselves because we tell them that they don't matter," he said.
While there is no research into the number of Indigenous LGBTI people who suicide, Mr Bonson said people only had to look at the high rates of suicide in both communities and consider how those who were black and gay experienced both racism and homophobia.
He said those most at risk of suicide were black, gay, and young.
Suicide was the leading cause of death for Indigenous people between 15 and 34 years of age in the years 2011 to 2015, according to ABS statistics.
The National LGBTI Alliance claims that LGBTI people are more likely to attempt suicide in their lifetime compared to the Australian general population — and those aged 16 to 27 are five times more at risk of taking their lives.
Transgender people aged 18 and over are nearly 11 times more likely to attempt suicide.
Mr Bonson said he could not find any positive LGBTI role models after he came out to his family and friends at the age of 21.
"I knew from my early teens that I was different because the world I was living in and growing up in wasn't reflecting someone like me," he said.
"There was nowhere for me to turn to and there was nothing positive reflected in our society that it was OK to be who I was — I know that this is still the case."
The debate around same-sex marriage emerged again this week after WA Liberal Senator Dean Smith, who is openly gay, announced his plan to push the Liberal party to allow a conscience vote on the issue.
However conservative MPs who oppose same-sex marriage say the Coalition must maintain its policy for a national plebiscite.
Mr Bonson said he became increasingly concerned every time the political debate re-emerged.
He believed that when discussing the lives of the people at the centre of debate, politicians were placing a lower value on LGBTI people — based on who they fall in love with.
"It is one of the most insidious forms of abuse and hetero-sexism and keeps them in the closet, which is not a safe place to be," Mr Bonson said.
"When the government first floated the idea of a vote, the LGBTI community fought back and said: 'No we can't go ahead with this plebiscite because the conversation can get very, very dangerous'.
"We will continue to traumatise young LGBTI people in the community with the negative discourse."