I want to leave the past in the past
What past are you trying to leave behind?
I made some mistakes in my life and I don't want to keep thinking about them.
That's good.  Living in the past allows old doors to stay open, and new doors to remain shut. If you can never truly let go of what's already done, then you aren't allowing yourself to have a better present or a better future.
That's really good advice, I appreciate it.
No problem, I'm glad you think so!