I cheated on my gf and never told her
My current partner (23F) and I (33M) are in a disagreement. When I was 18 I was a year into a relationship with, we will call her, C (18f.) After a competition I had a party at my house, we’d all been drinking. Another girl, we’ll call her A (19f) made a move and snuck into my room at the end of the night and I cheated on C. A and I never spoke again, C and I continued to date for another 2 years. I never told C I slept with another woman.
Am I the asshole for never telling C? Or was I right for preserving C feelings? C never did find out. Our relationship ended on a fairly good note as I moved away for college.
**EDIT I’m not asking if I should tell her now. I’m asking if I was in the wrong for never telling her back then or if what I did was right in a sense. It was never suspected and we never spoke about it.