Boyfriend refers to his female friend as sweet even though she has done terrible things?

He has known her for about 3 years. She is very attractive and rich. She only dates other rich men, and she only cares about the money. She has openly admitted to using a man she was dating until a better one came along. She told my boyfriend that she wanted to play with the guy for abit, have him in her life but be in control. Yet after all of this he will say ‘ but she’s very sweet’. I don’t know why he thinks this after all she tells him to be honest. What do you think?
Boyfriend refers to his female friend as sweet even though she has done terrible things?
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