<human>: Can you provide a brief overview of the text?

Long time, first time. Throwaway because she knows I'm on Reddit. 

My wife and I have been married two years, up and down but mostly up. We're still in love and have one child. I'll call my wife Amy. 

In December of 2014 I was in the middle of a crappy job and drinking way too much. This lead to fights with my (pregnant at the time) wife and I would sometimes go to bars after work. One of these times I ran into my ex girlfriend Betsy I dated right before my wife. There is no love lost between Betsy and Amy, in fact she hates her. I got with Amy right at the end of my and Betsy's relationship and she was rude to Amy. There were times that I talked to or texted Betsy while my wife and I were together and it became agreed that I'd no longer speak to her. 

Well, I do speak to her and end up driving her home and talking more with her there. Nothing physical happened, but I went over again a night or two later. Again, nothing physical and I decided I've no reason to see her again. 

Fast forward to summer 2015 and I tell Amy that I saw Betsy at the bar and talked to her. Amy loses it and we have an enormous fight that leads to me going to my sister's for the night. My wife was having panic attacks and I was honestly scared for her. Things got back to normal and I haven't spoken to Betsy (although she has tried to text me and I've since deleted her from my phone)  

Hiding the fact that I went to her place weighs on my mind, but I don't know if wanting to tell her is the right move. She deserves to know because she is my wife and should realize how terrible I was to her, but maybe I'm just wanting to get it off my chest. I don't want to hurt her our cause her more anxiety, but I don't know if this is something I take to my grave...
<bot>: I lied to my wife about the extent I saw my ex. Should I tell her the whole truth or spare her feelings?