Teddi Mellencamp has "taken accountability" for her past mistakes.

The 43-year-old reality TV star recently announced her split from Edwin Arroyave after 13 years of marriage, and she's now taken to social media to reveal that she's apologized for her previous mistakes.

Teddi wrote on Instagram: "The only person who can change your life is you. We have two options: pretend to be a victim or stand up and fight for yourself. We all deserve peace and happiness. I have cried and mourned. I have taken accountability and apologized for things I have done wrong. Now, I have given myself permission to grow and thrive.

"There are three sides to every story. How can I stand up and show up for the people that do matter? This is called being an adult. This is what saying it with my full chest means. (sic)"

Teddi filed for a divorce earlier this month, describing it via social media as a "difficult decision".

The reality star felt that being "open, honest and vulnerable was the best path forward" for her.

In a statement posted on Instagram, Teddi - who has Slate, 12, Cruz, ten, and Dove, four, with Edwin - wrote: "After a great deal of care and consideration, I have made the difficult decision to file for divorce. My priority is my children and ensuring that every care is taken with their privacy and wellbeing throughout this new chapter.

"Making a public statement is not something I wanted to do but in an effort to protect my family from undue speculation and rumors, I felt being open, honest and vulnerable was the best path forward."