I'm married and slept with 13 other girls during my marriage and have zero regrets
Why would you sleep with so many other girls?
I was so bored by this marriage. Having to be faithful is so limiting.
If you are unhappy with your marriage, you should talk to your wife and work through things together. There's marriage therapy as an option, but divorce is also a better alternative to cheating on her. Think about how she will feel if she finds out.
She didn't want a divorce.
She may not have wanted a divorce at the time, but I think you need to come clean about your affairs. It's the fair thing to do for her so she can know the truth and decide if she wants to file for divorce or try to work through these issues.