He says he couldn’t tell me because he was scared he would loose me and he has been addicted since he was 19 years old when he first got a job.
What this actually means is that he knew you wouldn't consent to being in a relationship with someone who behaved how he does, but continuing that behaviour was more important to him than you having the right to choose your boundaries and select a partner who behaves within them.
What you've found and what he's told you are the absolute minimum he has done.
Please don't burden yourself with a relationship that will at the very best leave a constant fear of him doing the same again and have you regularly checking his behaviour. It cannot be a healthy relationship now because he is a toxic influence due to the length and extent of his behaviour.
This wasn't a one off moment of madness. This is who he is. He's someone who lies, someone who pays women to do what he wants sexually and someone who has had opportunity and means to stop previously (he could have spent that money on counselling etc rather than paying women, likely young and often vulnerable women, to act out his fetish online behind your back).
He didn't do anything proactive until HE thought HE might lose you.
He was only interested in changing when the consequences of his behaviour directly affected him getting what he wanted.
It wouldn't just be foolish to bring a child into this relationship, it would be selfish. You say a baby is off the table for now, as if it's still a goal to work towards. It is a fine goal, but not one to work towards with THIS man.
Your relationship will always have an undercurrent of you knowing he is capable of this behaviour. That isn't what a healthy, happy, stable relationship looks like. Don't bring a child into that.