Skeeter, I hope you are doing better this morning. As hard as it is, he is showing you who he really is and you need to believe it, for your own sanity. He is extraordinarily cruel. He knows just how you feel and he's taking every opportunity he can to reel you in just close enough to twist the knife again.
I'm curious about your friends. Why do they feel the need to keep telling you about what he's up to. You have a friend who knows what he's put you through, and yet, she chooses him to dog sit. If I had a good friend who some asshole did this to, I'd stay as far away from him as possible. The last thing I'd do is let him into my house while I'm not there.
And you mention the need to make it more clear to your other friends that you don't want to know about him. How do they know about him? Better still, if they are so capable of knowing about him now, where were they while you were making the biggest mistake of your life by marrying him?
Now there's a good chance that they tried and you wanted to hear none of it. I've been there done that. I realized it in hindsight, when the pain cleared away. If that isn't the case, lose these so called friends. They are not your friends.
As long as you engage in any contact with him, he feels in control. This is about control. I suspect it's why he likes hookers. If you're paying the bill, you're calling the shots. He wants to come back on his terms only. He gets autonomy to do whatever he wants, and still has you. That makes you a hooker of the best kind. Free. That's not what you signed up for.
I know you're sick of hearing it, but the only answer is to completely eliminate any means of him having any contact with you whatsoever. If that means changing your number, do it. Cut off any friends who need to tell you about him, because he's using them to get to you. He's going to try every trick in the book to get through to you, not because he loves you, but because he can not stand to lose that control.
I had a long term relationship like yours, just didn't marry him. When I was in the phase of ending it like you are now, I did something that ultimately helped me throught it. I wrote down everything he promised when ever he was trying to suck me back in. I kept a running list. Then when I was sad, and lonely and tempted because he was trying to contact me again, I'd take out that list and check off which things he actually did. Not a single one. It would slap me back to reality, and stop me from having the "what if" conversation in my head all night. I'd end up laughing at myself for ever believing it even for a minute.
You'll get through this, and you will faster if you have absolutely no contact with him. He can't get in your head unless you let him. You will find that as each day passes you will grow to first get angry, then stop wondering and then not care. He's a small blip on your screen of life. And if you are like me, you'll grow to hate him, because you'll finally get rid of the emotions that kept you from seeing the real guy. And you'll wonder how you ever even thought of being with him and be grateful that you didn't lose even more of your life to this terrible person.