I'm so sorry you are going through this. It is so painful!
I've been married to a sex addict for almost 23 years. It is challenging and heartbreaking. I personally don't believe trust ever fully returns.
My husband also slept with prostitutes, visited massage parlors, pursued women online and was just an all around selfish asshole! This went on for almost 20 years before he disclosed after a marriage counseling session. I was beyond shocked! I never thought my husband would actually cheat on me, let alone pay for sex. He spent thousands of dollars and lied to my face daily for two decades. To say I felt betrayed is an understatement.
Thankfully, he has an amazing counselor who specializes in treating sex addiction. My husband has weekly counseling sessions, attends a weekly SA group, created a timeline, passed a polygraph and offers full transparency in regards to phone, computer, iPad and location. He has not acted out since disclosure (that I am aware of), this includes not looking at porn. He knows any slip will result in divorce.
My husband is a changed man. He treats me like a queen now. However, I still cannot fully get over
everything he did, even at three years out. I doubt I ever will. But, we have three amazing kids and complicated finances, so I stay. Plus, I still love him, and his actions show me on a daily basis how much he loves me in return. Although, if at any time he stops doing the work, I will not hesitate to walk away.