Expressing Admitting and Regretting Mistakes

*Sorry.
*I know this was my fault.
*Please fro give me.

*I'm deserve to have this.
*This is the price I should pay.
*I realize I've made mistakes.
*This has been my terrible mistake.
*I wouldn't do it anymore.
*I will pay for what I've done.
*Sorry, I didn't mean to do that.
*I didn't think of the consequences.
*It shouldn't be like this. Forgive me.
*It's OK.