Why doesn't my ex want to let go?

He broke up with me and allegedly has a girl but keeps reaching out to me. We finally had a talk on the phone and he told me he would understand if I wanted to go no contact to heal. Literally the next morning he messages me like we didn't have the convo and I said "why do you do this to me?" And he's like "what do you mean?" And rattles on like normal and I don't respond and then on valentines he's like happy valentines <3 like why do guys do this? Like why worry about me you don't want me but I don't get the pleasure of moving on in your mind?

Why doesn't my ex want to let go?
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