Why would he say im too pretty for him when breaking up with me?

: ( been 2 months i still miss him and am sad. He was just trying to make me feel better right. He also said that i am too positive minded and he's not like that so he's just going to bring me down. and i kept saying dont say that :( he later said mean stuff but at the beginning he was saying stuff like that : (

Why would he say im too pretty for him when breaking up with me?
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