Found out about cheating in the past

So, i am not sure what i am expecting from this post. I just feel like i really need to share it with someone, however, I don’t feel like sharing it with my friends or family.

So, here we go: Me and my husband were dating for 1,5 years, then we got married. We have always been a really happy couple. Believe it or not, we have never really had any conflicts ( arguments? For sure!).

Yesterday I accidentally found out that he cheated on me just before our marriage (that was 5 years ago). I feel lost and am not sure how to process it. It was a one night thing, which has never repeated since. When i asked, he admitted it and said that was a terrible thing to do, that he immediately regretted it and decided to delete it from his mind and never repeat it again.

While i still love him a lot, i am very hurt and the only thing i want to do is to leave and never ever touch or see him again. I cant even look at him. I feel like i was living in a bullshit for so many years. I also feel like if i knew before marriage that he cheated on me, i would never marry him in the first place. So i feel like he stole my choice.

It has been two days he constantly asks for forgiveness and explains how terribly sorry he is and how impossible it is now for the same thing to happen. Yet, I don’t know what to do. How to trust him, how to know if it will ever happen again? Or why did it happen in the first place? I guess i am asking what you, as a wife and mom would do? Would you leave? Would you stay? Would you leave it in the past? Would you swallow and pass on?

We have two wonderful kids, we spend a really happy time together. We do not have any problems in our relationship, never had. Well, until yesterday when i found out what has happened 5 years ago.