Used to hate me and I can't stand it
Cuz now you love me you so damn manic
He doesnt like it when people who “Used to Hate it” start liking him, because the only reason for that is that he becomes famous, and that makes people come.
He compares this behaviour to being manic, which is a reference to Manic Depression AKA Bipolar Affective Disorder. Bipolar people change their mood a lot.
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