Jenner is opening up in advance of the debut of ‘The People v. O.J.
Simpson: American Crime Story’
This article originally appeared on PEOPLE.COM.
She is speaking out ahead of the release of the FX seriesThe People v. O.J.

Credit: Gabriel Olsen/FilmMagic; Vinnie Zuffante/Archive Photos/Getty Images
Simpson: American Crime Story, which details the infamous murder trial.
It could have been prevented.
and Nicole through Kardashian when she was just 17 years old.
They were two of the best friends I ever had in my entire life.
They were my family.
was like my big brother.
So I not only mourned the loss of Nicole, but I mourned the loss of O.J.
Indeed, the two families were incredibly close.
(Tragically, Jenner and Nicole even had plans for lunch the day that Nicoles body was found).
She was funny, she was beautiful and loyal and passionate and the best mom I had ever met.
Sadly, Nicole was hiding a painful secret, one that Jenner only learned of during the trial.
], says Jenner.
That was stuff I didnt know anything about.
I beat myself up because I felt like I wasnt paying attention.
Like, how did I miss this?
But thats typical in an abusive relationship that the woman doesnt speak out about how shes being treated.
Jenner adds: My heart breaks because of all the pain and suffering she went through.
I wish I had noticed the signs.
She was fighting for her life many days Im sure.
I give a shot to pay attention to things more now.
I follow my intuition.
Simpsonwill shed some light on a very real and very widespread issue.
Domestic violence is a real tragedy in our lives, says Jenner.
[Nicoles death] could have been prevented.
And if Nicoles legacy can be protecting other women, then that would be a really positive thing.
American Crime Storypremieres Feb. 2 on FX.