Your SO was pursuing another woman. He had as you put it, "numerous affairs" at the start of your relationship. Being honest about his actions now is not the same as being remorseful. He may have made suggestions to prevent something from happening again, but words are cheap.
But I think this says all that you need to know:
"I can't guarantee this won't happen again."
So, basically he is already making an excuse for any future affairs. He is saying that he has no control over his actions. So, is he expecting you to not be upset, hurt, or surprised if it happens again?
The Wayward forum is filled with truly remorseful WS's. There are many threads where people are sharing what they are doing to help their spouses heal; or asking for help on how to help their spouse. They are being proactive and taking steps to prevent an affair from ever happening again. Changing jobs, moving to another city, IC, etc.
What has your SO done to show that he is remorseful? Has he done IC?
What are you wanting in your relationship and what are you willing to live with?
"You are what you do. A man is defined by his actions, not his memory." - Kuato in Total Recall
I do hope for your sake it was miscommunicated. I know people who have these I caanot predict the future therefore I will tell you worst case scenario perspectives...I dont find it fair. It makes it really hard to navigate their true intentions when they make these kinds of statements.
He also made some valuable suggestions to try and prevent something of this nature from happening again
I'm curious about this statement. Were his suggestions for you or him? He's not trying to say if you do xyz that it will help him to be faithful, is he?
Your going to be having a little one very soon so I hope for right now you can concentrate on taking care of yourself.
I know its hard when you have this info to think about.
I'm afraid I agree with the others, he's not making any promises this won't keep happening. I'm really sorry that at a time you should be feeling joyous, he's causing you this anguish. Take care of you and the little ones, he wouldn't be on.my.priority list right now. Let him take care of himself
He's a serial cheater whose cheated his entire life, and moral-less as he may be, at least he's honest when he tells you he can't guarantee it won't happen again. He knows it's going to happen again and I think deep down, you do too. He's not remorseful because this is a way of life for him.
I think it comes down to whether you want to spend your life with a serial cheater or whether you want to seek better for yourself.
I think your last statement about having been through this 'so many times now' pretty much sums up what you can expect for the rest of your life if you stay with him.
Good luck to you.