How to forgive myself after being in a relationship with a married man?

I was in a relationship with a married man for 4 months. I kept convincing myself that everything was worth it because of love. Finally and very suddenly I decided that I don’t want this anymore and let him go. I blocked him on everything. He contacts me with different numbers and social media accounts almost every minute and I just ignore him. I completely ended everything with him. In a matter of a day my love became this shame and hate towards myself. I can’t believe I did this and I’m so ashamed of myself and every time he contacts me and says he loves me I feel disgusted. I hate myself and I don’t know what to do. I met this guy recently that I really like but I’m ashamed of even looking him in the eyes because I feel like a pos. How do I forgive myself?
How to forgive myself after being in a relationship with a married man?
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