How to change a perception?

My girlfriend left me while my world was spiraling. lost my job, started not caring about anything, and she moved out. i did all the bad things you shouldnt do, beg, pleaded, talked to relatives, etc. Turns out I had untreated ADHD which worsened my depression over everything. Aside from moving on, does anyone have any advice on ways to paint a more favorable picture of me in her head? I hate going out like that, and I cant stand someone looking down at me...I obviously would like to rekindle things at some point, but she has seen me at my worst...