Can't get over my ex bf who even though I was deeply in love with treated me very badly so I had to end it. How do I make moving forward easier?

I was married for just over 10yrs... high school sweetheart... came home early one night from work... I was always being asked to pick up as much overtime as I could get from my wife... I figured having two kids that anything I could do to help our family was not too much... Well that one night I came home early.. I must have surprised her... for when I opened the home computer... boom... i was in the middle of a her email and a letter she was writing to her lover...... i was crushed completely... I went to the bedroom where she was pretending to sleep and confronted her... she blamed it on drugs which i knew was false... i had worked my ass off for her and my two kids... for this betrayal???

I left that night... went to a bar across town to get drunk and consider my options... an old mature woman befriended me... I told her my story as we drank... she loved to sing kareoke and she was really good... after a little while she had me singing with her and at the end of the night we actually won the $200 kareoke prize that night... she took me to her place and we had one amazing evening...

I stayed until sunrise and went home... i tried to forgive my wife but my heart was still broken... I stayed until the month before our 20th anniversary and left... only because I would not have another man raise my kids...

I am now remarried... happily... and my ex has found a rich guy that loves to do everything she hates... lol

Karma.