I used to steal from the cafeteria at high school?

I used to steal food from the caf at high school at grade 9/ 10. I think i stold about 50 dollars worth of food altogether. I did it because i thought it would make me cool. It was an asinine thing to do, I know but i really regret it and i cringe everytime i think about it. What can i do to finally put all that behind me??/ Should i go back and pay the caf lady and fess up or just forget about it and move on. Obviously i would never do that again, i was a stupid kid. I'm 19 now btw.