He doesn't act like her boyfriend?

I have a crush but she has a boyfriend. And this is confirmed too because there's a picture of her kissing him on the cheek. It's a fairly new relationship (although they've been friends for awhile) but I still find it kind of odd. He doesn't do anything that is really boyfriend-like. He doesn't hold her hand, ignores her to talk with his friends, never hugs her, when they leave he just says goodbye, doesn't kiss her, anything. The other day also she was complaining about him not taking her on any "real dates." And this is the exact behavior of her douche ex... I don't really understand it, it's pretty much like they're just hooking up, is it that her intentions are different than his?
He doesn't act like her boyfriend?
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