He just broke up with me?

My ex broke up with me a few days ago and I feel horrible. Our anniversary was coming up and I told him to order our clothes. I asked him multiple times to order them and he kept saying he forgot. I got really mad at him and told him since he can’t prioritize our relationship I was going to distant myself for a couple of days. He didn’t lash out, or anything. He just left me. Broke up with me. I don’t understand, why didn’t he fight for the relationship? Yes he apologized in the beginning but I’ve asked him to do this multiple times to do these things. I do not understand why he broke up with me.
He just broke up with me?
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