"I get that," the former Olympian said, "but what I'm doing is going to do some good"

Bruce Jenner addressed speculation that he chose to share his life-changing choice to transition from male to female with ABC’s Diane Sawyer for publicity reasons during his sit-down interview with the host Friday evening.

“Yeah right,” he told the ABC journalist. “Do you have any idea what I’ve been going through my whole life? And people think I m doing this for publicity.”

But because he has been in the spotlight and on reality TV for many years, the former Olympian understands fan skepticism.

“I get that,” he continued, “but what I’m doing is going to do some good.”

Jenner, who is 65, is determined to make a change in the transgender community, even if his personal story must be examined in order for that to happen.

“We’re going to make a difference in the world with what our doing. If the whole Kardashian show Keeping Up with the Kardashians can be the foothold, I am all for that,” he said.

But why now at 65 years old? “I just can’t pull the curtain any longer,” he explained.

“Bruce lives a lie,” he said. “She is not a lie. I can’t do it anymore.”

For more information about transgender issues, visit the Human Rights Campaign GLAAD and PFLAG.