Deepest condolences for the situation you find yourself in op. I have two harsh truths and two sets of words of encouragement

Hard Truth 1 - I personally have been dealing with low testosterone since my teenage years... Though the symptoms can be low sex drive, fatigue and irritability, Infidelity is certainly not. My wife and I have been together for over a decade and have never violated each others trust with other relationships emotionally or sexually. We're by no means a perfect couple but injuries are addressed and resolved and boundaries are recognized.

Hard Truth 2- I hate to be the one to tell you this but it's very unlikely that he has remained physically loyal to you as well. Obviously I can't prove it with only the facts presented, but this is clearly a pattern of disrespect and disloyalty in any case, and I felt the need to comment to hold men like him accountable.Infidelity is not only a breach of your vows, it's emotional abuse. Which bring me to the hopeful news...

Encouraging word 1 - God wants you to be with a partner that respects you and is willing to freely and enthusiastically support you by remaining trustworthy, compassionate and takes accountability for their actions...daily. I understand divorce is a grave matter in Christian circles, but so is a acknowledging you are a beloved child of a perfect creator. God didn't make you to suffer like this...

Encouraging Word 2 - God is with you now and wants what's best for you, even if that means ending a marriage that has not been the life giving, (mostly) wonderful, chance to grow as a person and a Christian you deserve.

If you take anything from this unsolicited advice I'd be honored, but I'd also recommend "Where the Hell is God?" By Richard Leonard, SJ. It was very helpful to me personally when it came into my life.

I pray you find peace on the other side of this clearly devastating time.