There's an old saying, water seeks its own level.
Don't begrudge his actions, nor feel anger toward her. Perhaps come to see this as a blessing. He showed you that you deserve better than the man that he is not.
When I was a teenager dating, I'd find myself involved with what I thought was a really great guy. Handsome, fit, employed, loving, all the good qualities. Inevitably there would come a time when he would feel like unburdening himself about his last ex. Oh, she was horrible. An then he'd vent. This happened with quite a few men I would meet and talk with, or dine with thinking perhaps they were worth while and perhaps "the one".
Sure enough, there would come a time when he wouldn't call. He'd stand me up. Then I'd find out that he went back to the Succubus he so heartily condemned prior. I often wondered if she was aware of how he felt when she wasn't in his life.
All that heartbreak, let down, and what was actually the guy's fault, not mine, worked on my sense of security in myself. I became worried the next guy I'd be interested in would be "him" all over again.
I swore off dating for years and then when I moved to a different state I met a guy at the apartment complex that I can only say became home due to God moving.
We moved in together, we became engaged. Then, as if out of nowhere those insecurities I felt due to other guys breaking my heart showed up. I was miserable and for a short time I made him miserable too with my emotional baggage holdover.
Then, one day, he looked me in my eyes and said simply enough: "I'm not them!"
He hugged me, gave me a kiss and went to work. Where I was so afraid he'd find someone else, fool around, leave me. Nonsense fictions that would run through my head because the ghosts of boyfriends past decided to show up when I was at my happiest.
However, when he said that it resonated and drowned out all else.
So I sat down on my couch and I pictured those guys that I had trusted with my heart and who had stomped it to pieces. I saw them as if they were standing before me and I made a resolve, out loud, thank God for thick walls in the apartment, you are my past and I will not give you the power to hurt my present happiness.
Then I took my hands and wiped my shoulders , picturing myself gathering all that baggage I'd carried from them having hurt me. And when I'd wiped my shoulders enough I closed my eyes and said, GET BEHIND ME! And I whipped my hands backward as if releasing something in my grip into the wall. I pictured all that baggage vaporizing to nothingness.
I took a deep breath and it felt like someone had lifted a weight from my shoulders. I felt physically lighter and more open and free. From that moment on those memories and pains never bothered me again. I moved forward, secure, happy, and entered a marriage that has lasted for a great many years now.
Don't let the weight of your past strike the joy from your present. You have the power to be happy. Don't let anyone use their power to strip you of that.
That guy is not for you. He told you that by his actions. Consider yourself blessed you did not waste another moment on a man that has no respect for himself, or he'd not get with a woman as bad as he claimed she was. Remember, you have his word for it. You don't know her.
The right man that God has in store for you is out there right now praying for the day you meet. And when you do, you'll not have any doubt. And those men of your past will be a blessing to have moved on out of your life so that you would not be occupied paying attention to the wrong one, so that the right one escaped your notice. Because the right one isn't interested in a woman who has a man in her life. That's why Fidelity is a treasure that cannot be surpassed.
God loves you so much he doesn't want you to settle for less than you deserve. Be patient. And in the meantime, learn from your encounters with everyone. It can only make you stronger, only if you give it permission.
We see the world through the residue of our experiences within it. Cleave to the good.
Blessings to you.