Sometimes I think it means I love you but sometimes I hear this expression in non-lovely situations.
A: Mr. Corlone, I’m really sorry to trouble you, but I need your help.
B: Anything for you, Charlie! Your father was like a brother to me.
two men are talking in this example so this is not a lovely situation or falling in love :)
A: Thank you soo much you're the sweetest.
B: Anything for you
so what does this expression actually means?