What advice would you give?

My ex after 4 years ended our engagement abruptly. I experienced a lot of body shaming while he looked at other women. He broke it off after I expressed my concerns as well as me saying that it didn't feel like we were moving forward. Like I stated in a previous question he demanded the ring back so I gave it to him. I gave him the ring plus all the gifts he had ever gotten me. He text me and said that he only wantedthe ring back and that I was a good person but I argued too much. He didn't want me to be mad because he left and he asked me not to have ill will. How can you not have ill will after this experience?
What advice would you give?
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