The PROUD Pathological N---I want to SCREAM! Please help

I am feeling so angry right now, I am thinking about all the B.S. my ex N put me through,,oh My I am so angry. Just now, I remember him coming into my office, hicky on the right side of his neck on a Monday morning,,how he sneaks in all his other sex relations I don't have a clue,,it make me so angry everyone!!!

He is so proud of himself, having cold, nerves of steel, that let him hurt others without a flinch.

He thinks he is so suprior to everyone else because of what he does.

He continues to seek to tyranize me, and it has been broken off for 5 months now!

He comes by the office, and he says "Hi" to me like nothing ever happened.

I have never had closure, I have never told him to his face what a true idiot he is to do this.

Why would he continue to drag me through pain?

Why can't he just be done with me?

He wrote an M on the stair well of our building like an imprint of himself when he moved his office outta here a month ago.

It is like he wrote it there to say "I will always be here, lurking behind the walls, watching you, I am in deep"

What makes me so mad is HOW HARD I WORKED ON THE RELATIONSHIP.

I worked so hard on the relationship, was there to talk to him and console his insecurities. Boost him up during his divorce, talk to him endlessly at night when he had doubts about himself making it.

Text him during the day to tell silly jokes...make him dinner, buy him clothes, drive 70 miles to his house, bring my things over there, make his dinner, make his drinks, he knows how hard I worked on the relationship.

And he is living/dating another woman and seeing a third?

Where does he get time? How does he sneak it all in?

It is making me really mad? I am starting to feel like I did something wrong to set him off to do all this,,I know I didn't,,maybe he thought I was cheating (he said that) and I told him I never ever dated anyone else other than him while we were together.

I have no closure. I have not told him to his face how dispicable he is.

I just went NC.

I have not vented to him. I thought it would be a bad idea. Now I feel like he is getting away with murder, and rubbing it in m face!!!!!

I want to tell his ex wife that he wanted to get a joing checking account to hide money from her so "we" could have more together, bullshit!!!

I want to tell his live in that she is getting her ass sooo fooled it is unbelievable!!!

I want to text her and tell her to get a clue!!!!!

I am so mad, he has gotten so much out of me, I worked so hard on a good, honest, loving relationship, and it was just f'd up!!

He acts so proud of himself for all this, it just makes me sick..

For closure, would you either contact his ex wife about all the harrassment and lies and "joint check" account to hide money from her and their kids,,would you remind his live in that she is getting used beyond belief,,and she is turning a way blind eye to her and her kids reality!!

Why did all this happen,,and why does he continue to want to harrass me,,even after it is over!!!!!!!