I found out he cheated once again, tomorrow is his birthday I cancelled all the things I had planned am I wrong?

Found out he lied and cheated on me again yesterday. I had so much planned for his birthday tomorrow but cancelled everything. Now he's saying I'm petty and a bad person for leaving him alone on his birthday.
I found out he cheated once again, tomorrow is his birthday I cancelled all the things I had planned am I wrong?
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