I would lie for you and I would lie to you. Does that show I love you? No it doesn't it just shows I'm a lier.
I would kill for you and I would kill you if you wanted me to. Does that show I love you? No it just shows I'm a killer.
The only way I could for me to show you that I love you is to say I love you everyday for as long as I can and for you to believe me. That is the only way I can show you that I truly and deeply love you.