Forgive but can’t forget

Hey guys. Okay. After years of being married, me and my husband one of the toughest year last year. When went through this rough patch last year where we faced a hardship financially and it was very stressful for the us. It got so bad that we slept in diff bed rooms because we began to blame one another and we just coexisted into the house for months. Our house flooded due to a water leak and omg it put a big strain on paying it out of pocket. He had to work doubles and then through all of it, we started to take the frustration out on each other. Then I found out he cheated on me for the first time ever in all our years. One day I was on his phone and he was telling them female how bad it was at home and that he thought I was gonna divorce him (but I never said it, we just was not talking to each other without arguing) and so he slept with the woman. I took pics and printed them out and faced him. He confessed and said he thought I was gonna leave him. We have done counseling but I still feel like I can’t trust him because he betrayed me. I have anxiety and I’m still insecure about it. Like I told him, “no matter how hard things were at that time, I never thought to go to another man to get what I wasn’t getting at home”. Even though things seem to be better now, I can’t forget what he did. I’m still hurt about it and still think like “what if” and it’s made me insecure. But I put on this act with him like we can get past it. I wanna believe we can. Because he has been making effort and we talk now, go on dates and spend more time with each other, and it look like we are getting through it and he seem to sorry. But I don’t think I’m over it... I gave him another shot because we have a baby together for one and I wanted to see if he can restore my trust and faith, but I still think about the other woman. Like what did she have that I didn’t? And other things.. 😓 I gave him a chance because we have a baby together together and I wanted to see if he was sorry and if he willing to try but I think it’s me that’s the problem now because I can’t forget it. So my question is: do I throw away my marriage of 5 yrs for a one time mistake? How do I get past this?