Why i’m done dating after getting hurt again

After leaving a traumatic dishonest relationship in 2025 I guarded my heart until January 2026 when I met a man who made me feel safe and valued again. However I soon discovered he had been in a committed three-year relationship the entire time
Though I initially cut him off he returned months later and my deep attachment led me to briefly entertain the connection again. Ashamed of participating in a situation that hurt another woman—something I personally survived in the past—I cut ties completely.
It has been two months and I am still struggling. I don't want him back but I am deeply hurt that he deliberately manipulated my feelings for sport. Seeing his girlfriend—an online personality—frequently post about what a great partner he is feels surreal and deeply unfair. I blocked them both and chose not to expose him or cause drama focusing instead on my successful career and personal life.
Despite being a romantic at heart I have officially retired from dating. I would rather build a fulfilling life alone than risk another heartbreak. I don't envy their relationship but it is painful to watch the person who hurt me enjoy a happy life while I am left to rebuild myself once again.