I had an affair, it still hurts and I don't know what to do

Hello,

I fell in love with a co-worker a little over a year ago.
I knew she had a husband and a child, but my heart chose it that way.
She actually started it, it started with flirting, then more and more until we met once alone and she kissed me. Then I told her I loved her.

Since then, we met as often as we could, at my place, in the city, or at her place (when her husband was at work).
I found out then that her marriage was a failure, her husband insulted her every day, there was often violence and he pushed and beat her.
She would sometimes run away from home before him.

I wanted to give her a chance for a new start, I asked her to report it to the police and leave him. She said she didn't want to report him, but she definitely wanted to leave him.
It lasted about 4 months, I was waiting for it. But that didn't happen. After these 4 months, she started ignoring me slowly (we see each other every day at work), I was still nice to her, I tried for her, and I was romantic. But she deceived me, after another month she told me that she would not leave him and that we should be friends.

I really cared about her, so I wanted to try to be friends.
But it didn't work out, I felt jealous of him and the fact that he won against me. After everything he'd done to her, she still chose him. And she didn't tell me the truth right away, she just deceived me.
I wanted to take revenge and somehow tell her husband about it, it hurt a lot, I cried practically several times a day, I fell in love with her very much, maybe I'm a little pathetic.
It was close to her husband finding out, but ultimately he still doesn't know anything.
We quarrelled many times, she started accusing me of a lot of things and even attacking me. I stopped believing and hoping that he would come back to me (after some time).

However, here I am, it's been over a year and I still love her and every day when I see her at work I feel this pain in my heart and jealousy. Suddenly she started to love her husband, and she writes about it on Facebook and tells how loved he is.
I also started seeing a psychologist, but it didn't help me much.
I'm trying to change my job, but every day I think about telling her husband everything.
I want to ruin their lovely marriage, but on the other hand, I don't want to hurt her.
I know it will eventually happen and I'll tell him, I feel it. Probably when it hurts so much that I can't take it anymore.

What do you think, did she deserve it?
I don't know what to do to get rid of this feeling.
I've tried dating but it doesn't help.