I think the advice to pray about it is a little crummy and dismissive. I don't think God is going to purge you from remembering or caring. God doesn't want you to helplessly rely on him, he wants you to take an active role with the talents and brains he gave you.
You are my friend Peachie so I say this of love and respect.... but IF God didnt want us to "helplessly rely on Him" why would He make us so utterly helpless to save ourselves or to be so helpless that we cant even control our own minds in our own strength?
Jesus even instructs us to NOT lean on our own understandings.... which would make us independent with the very intellect that He gave us.
IF He doesnt want us to helplessly rely on Him why would Jesus have said "Apart from God you can do nothing" or say that unless we are like little children we will not enter the kingdom.
Children arent independent, no matter how much a little child may pull away from their parent desiring independence.
Yes, God gave us abilities and brains to be used, but He also created us to be wholly and helplessly dependent on Him. We cant even control the beating of our hearts.... so we are truly helpless and reliant on Him, no matter how much we in our human ego may want to believe that we are independent.
God gave us the intelligence and gifts we have to be used in union with a dependence on Him as those gifts come from, not to be used as tools for independence from Him.
Again I say this out of love to a friend, not to be disrespectful.
As for the OP, your pain is very real, but it's not fair to hold her past against her.
IF you love her, accept that in order for her to become the woman you love and married she had to make many mistakes. If she DIDNT make those mistakes she would be a completely different woman because she missed out on the mistakes that shaped and molded her into the woman she became to say "I do" to you.... the experiences she learned from in those mistakes.
You took her as your wife, that means you take everything she is and will be.... like it or not, everything she was is also part of the equation.
Instead of holding it against her that she made mistakes that you didnt. Focus on the things that those past men do not have. Such as, YOU are the one that has such a great woman to call your bride instead of those men. They can not claim the treasure that YOU saw in your wife that made you say "I do"
Value the treasure that is your wife... not some image in your mind of her being younger/better looking/wilder etc.
That doesnt mean that you have to like the idea of her past, but you DO have to accept it because that past is now part of your flesh.
Having been a virgin it WAS fair for you to desire a wife that also waited.... but you didnt. Your reasons for not reserving that right are your reasons but you cant hold your choice over her head. Especially when 90% of the stuff in your head is likely your own imagination.
Yes, they may have been with your wife when she was younger.... but what do you value more, a past that is magnified by your imagination or the woman that is your wife today?
As much as you are hurt by her past, she did those things before she knew you.... you are hurting her with your judgements, resentments and rejections today.
I'm not saying you are wrong, simply that you made your choice to NOT demand your wife be a virgin.... that choice was yours, now you must make the choice to either take it to God and allow Him to change your heart so you can move past it... or you can push your wife away with resentment.
Life is so much better when you just let go of the pain, in your own past and the past of others. To just love, live and enjoy the time you have now with the ones you love in this breath... not to spend that breath in resentment or jealousy.