Hi OP,
Funnily enough i wrote a post titled the same around 2 weeks, after finding out my boyfriend got very drunk and had a one night stand with a stranger (dont know her name) in the club toilet.
I, like you, was heartbroken. I thought our relationship was secure, strong and we were madly in love. I never imagined i would have to deal with this pain.
I am 2 weeks since finding out, and i have decided to try and forgive him. I have spoken to many, many wonderful people on here who have given me excellent guidance and reassurrance, and wanted to let you know that you can private message me any time you like.
Firstly, its okay to not know what you want. Its okay to be missing him one minute and wanting to rip his face off the next. You are managing some serious emotional trauma right now, and he should respect that.
My advice would be if you think there is a part of you that might want to reconcile, bring him back home. Space will only help you to seperate, but being around eachother will be the only way you can decide how you really feel. If you are to work things out, you are going to need to do it together.
His actions will define how you feel. Since finding out myself, my partner has been absolutely perfect in every way. Not through guilt, but what i believe to be remorse. He knows sex is out the window for a long time, but he is working building back our emotional relationship - and because of how hard i can see him working, i feel like i am starting to fall back in love with him again.
I believe it is possible to move past, maybe because thats what i want to believe. But, it will depend on his actions.
For my scenario, the circumstances around what happened i believe are easier to forgive than a fullemotional and physical affair. My partner also told me the minute he saw me, I am not sure how i would feel if i new he had lied to me for 10 years.
As far as asking questions about her - i did that to my partner, and he told me everyhting (that he could remember) - and my advice would be to really think hard if you actually want to know the answers, because you will never forget. I struggle daily with the images and imaginations i am coming up with in my head. Thats one of the hardest parts, and i wish i never asked.
I am so sorry for your pain OP, i wouldnt wish this feeling on my worst enemy.
Only you will know if your relationship is worth saving, it is extremely difficult to move past it, and i am only 2 weeks in so very very fresh but feel i have come on leaps and bounds since - which is mainly down to his actions. I am hopeful i can make my situation work, because i want to. People are quick to say i could never forgive, especially if they have never been in that situation. But dont listen to them, they dont know you, they dont know your life or your relationship.