The last person you think you have to worry about poaching your girlfriend is your best friend—the guy you’ve known forever, who has seen you at all your highest (and lowest) points. Right?So you’re probably wondering why your girlfriend is always flirting with him. Okay, maybe not always flirting,

Before you reveal your partner’s penis size to the millimeter or divulge your girlfriend’s sexts to a group of pals, read this list of what to screen from even the best of friends.   Anything Your Partner Doesn’t KnowDo you have major underlying resentments toward your partner because he's been