Only you can make the choices that shape your life. Others can come in and share their experiences, their pain and hope that somehow something gets through that clicks for you and helps make sense of the confusion you now feel. My first husband cheated on me after our son died. I was partly responsible for that because I was so numb with grief, I stopped caring about him, about me. I was in a daze and finally, he looked elsewhere. I caught him with my then best friend one day and woke up quickly to the reality of cheating men. After our lengthy divorce, we met a few years later and he told me of others he had cheated with while we were married for ten years.
I was stunned, but not surprised, not really. Some men just have that roving eye and that itch to scratch. For my ex- his was born of a confusing childhood full of no less than 17 step dads! His mom was a raging alcoholic, but she needed to be married for whatever reason.
I am glad you have put distance between the two of you for now, it will help you to get clarity of thought. Trust me, he is not the only man out there that will tell you are beautiful versus stupid or ugly or unattractive. You did well to not set yourself up as a victim even if it would only have been a victim of love.