I am allowed to feel some type of way and make him feel how he made me feel right?

I knew he was talking and had to be seeing someone else because he would reject me , not say a word to me. Not talk to me all day nothing. When things no longer were good with them now he texts me non stop and want to see me and everything else all a sudden. He tells me he took her fishing , met her daughter , went to a family cookout , he had been to her house , she had been to his house all in one week.
I am allowed to feel some type of way and make him feel how he made me feel right?
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