Why would a guy be so harsh and one week tell his girlfriend he really likes her , the other " loses interest" and block her?

Why would a guy do this to his partner who was already abused in the past and cared for him deeply. Why he act meanly if she tries to reach out?

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+1 y
Sorry ghost her... He ghosted me
Why would a guy be so harsh and one week tell his girlfriend he really likes her , the other " loses interest" and block her?
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