The 31-year-old split from her husband Kris, 26, last month, filing for divorce just 72 days after they married.
In a new episode of her reality TV show Kourtney & Kim Take New York, she is seen crying as she talks about her marriage.
Speaking to her sister Kourtney, 32, Kim sobs as she says: 'He fell in love with me and I fell in love with him and now my feelings have changed. And I failed at this. You don't think I feel bad?'
In another scene she is seen in a discussion with Kris as they talk about whether to live in his home state of Minnesota.
Kardashian says: 'How am I going to have my career and live in Minnesota?'
Humphries responds: 'Maybe by the time you have kids, no one will probably care about you.'
Kourtney & Kim Take New York airs in the US on Sunday.