How do guys feel deep down about rejecting a girl by ignoring her? Why do they have to do this?

How does a guy feel when he indirectly tells a girl he isn’t interested by avoiding her instead of telling her directly of his disinterest toward her?

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10 mo
Also , if the guy had been close emotionally with the girl and she was good for him, what difference would it make to his feelings?
How do guys feel deep down about rejecting a girl by ignoring her? Why do they have to do this?
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