Unless Dan is gay, his interaction with your girlfriend is WAY over the line, and the "I miss my Dan time" thing would have been a BFD for me.

Why are you just letting this slide? Man up and claim your woman. I'm not saying you should go all caveman all over her, but just sitting back looks like you don't give a damn, and that's not the message you want to send to her.

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I think all women really want is to be proven wrong about men.