Well, she sounds more pragmatic than you (look it up). Thank her for her honesty; a lot of people would simply say the words without giving a meaningful answer.
"Ends of the earth for someone" is a bad idea; the only time you should even consider this attitude is if you have children who are dependent on you and you've managed to get yourself into a bad situation. You sound a bit naive and too willing to sacrifice yourself for another. Adults don't do this without extremely good reason and can generally avoid such extreme scenarios with thoughtful planning.
Second thoughts can generally be amended with judicious action; injudicious actions can seldom be recovered with second thoughts.
--Cyteen by C.J.Cherryh