I cheated on my ex girlfriend 15 years ago.
Back then it did not feel like ‘cheating’ because I did not really like her, but a few years ago I started regretting my past actions.
When I think of the pain I caused her, of the blow it might have been to her self-esteem, of the mistrust she must have had of other guys after me, I realized how wrong it was.
I don’t think I can ever make up for that sin.