Am I(22M)wrong for breaking up with my girlfriend(22F) after I found out she cheated four years prior

I recently broke up with my Girlfriend after 5 years of being together. We were very happy together and I truly thought we would spend the rest of our lives together. This happened after I found out that during the first year of being together she cheated on me with a male friend of hers. She never told me and I had found out through one of her friends who felt bad for me after I was thinking of proposing to her. I was truly hurt and felt humiliated after thinking about it decided to dump her not only for cheating but also for lying to me for four years. After confronting her she had told me that she didn’t tell me because she didn’t want to hurt me and the only reason she cheated is because she wasn’t sure about our relationship during our first year. Since we have a 6 month old child together I’m still forced to see her all the time and she’s recently told me how’s she has changed and has felt all kinds of remorse and guilt over what she has done she truly feels sorry. I can’t take her back because the trust is broken but I still choose to respect her for the sake of my child. I’m also still in school trying to get a diploma so I can provide for my child while also working 5 days a week during nights fulltime. Some of our other mutual friends have recently been saying how I overreacted and i ruined our relationship by breaking up with her. AIW ?

Tl;dr gf cheated on me and lied about it for 4 years

Submitted June 06, 2020 at 10:13AM by Throwaway4799__ https://ift.tt/2BDxzV3