I always try to be polite, and every girl says "I like you as a friend"
I remember one time, a girl I really like didn't heed my warnings and hooked up with some massive jackass. I told her this: "If you hook up with him, you will regret it. Don't do it, this guy is an ass and will treat you like crap. If you do do it, don't come to me for help, because I won't give you any."
2 months later she comes to me going "I don't know what to do, he treats me like shit, takes my stuff, and is an asshole."
I replied as any gentleman would reply: "Quite frankly my dear I just don't give a rat's ass."