This question is really the same as have you ever loved anybody more than yourself. If you have, there is a good chance that you would die for that person and therefore you'd do it. Don't get me wrong there is a decent amount from the 6 billion that the earth could do without, heck some of you are on this form right now
but it's very unrealistic and it's not going to happen so it's ok to lie too.
To answer your question, yes, I have loved someone else more then myself.