The reality star, who ended her marriage to Humphries after 72 days, appeared on The Tonight Show and told Jay Leno that she owes her family "so big" for supporting her during the aftermath.
Kardashian also revealed that she never expected such a hostile reaction from the media.
"I pride myself and my family on being an open book," she said. "This is what we do - we share our lives on a reality show. And so when this is our reality and this is what's really happening, we show it.
"It was really tough to go through and I didn't know that the media would be so brutal with it, but I learned so many lessons and it's changed who I am as a person, I think for the better, and the things that I care about in life have completely changed because of this. So I really think everything happens for a reason."
Kardashian explained that she is "in love with love" and continued: "I thought this was it for me but when I realised it wasn't... I've always tried to be really respectful to everyone involved. I wanted to be fair to me but I also wanted to be fair to someone else.
"I hear stories of people who are married for ten years and they knew it wasn't right but they wanted to stick it out, then they involve kids... I believed in love, I still do, but I felt like to be fair to everyone I just knew I had to end it. And I'm okay with that decision - I know I made the right decision."
Kardashian acknowledged that some of her family were unhappy about the marriage but explained that when she is in love "you can't tell me anything", adding: "You look back and you're like, 'Okay, that was a sign' or, 'Maybe I should have listened to them', but I wouldn't have been who I am today if I hadn't gone through that."
Kardashian also denied claims that her marriage was fake, saying: "We are exactly who we are whether the cameras are on or off, and that's why I love my family so much. What you see is what you get, and I showed my life and the reality of my life, and it might not be pretty all the time, but it's who I am and I learned so much from it."
Humphries's lawyers recently released a statement vowing that the basketball player will "set the record straight" about the short-lived marriage.