Love Island stars told about Caroline Flack's death ahead of Sunday's finale
The couple briefly dated in 2019, and Cipriani said he had shared many intimate issues with Flack because she made him "feel safe".
The 32-year-old also described his own struggles with mental health and depression in his early 20s.
The tribute comes after last Sunday's episode was cancelled "out of respect for Caroline's family" producers say. "She was dealing with this for 20 years".
"Ultimately it was embarrassment and shame that killed her", he said.
"I decided at a point it was time for me to take my own life". I don't care any more. "Good luck tomorrow, I know it will be hard".
Danny Cipriani (L) of Gloucester Rugby and Tom Marshall of Gloucester Rugby during the Gallagher Premiership Rugby match between Gloucester Rugby and Exeter Chiefs at Kingsholm Stadium in Gloucester, England, on February 14, 2020.
All previous police contact with Miss Flack was reviewed by Scotland Yard this week, with a referral made on Wednesday.
Addressing her widespread assault cost, she went on to say: "Inside 24 hours my entire world and future was swept from below my ft and all of the partitions that I had taken so lengthy to construct round me, collapsed".
Love Island will return in the summer back in its usual villa in Majorca for what will be its seventh series.
Finally, one fan said: "We're all behind you Laura".
He said Flack's death meant he could "see clearly now" and was "strong enough to share my moments of vulnerability".
"Like many of you, right now we're all just trying to come to terms with what has happened", he said during the speech, "My only hope is that we can all try and be kinder, always show love, and listen to one another".
He also paid tribute to Flack, the TV presenter whose death has sparked questions about intrusive media coverage in Britain, urging news outlets and people on social media to "be kind". "If it's great, buy it". "Don't make it take for an artist to die before you buy his painting".