Will you disregard your principle just to make the person you love happy?

A friend of mine asked : In your own opinion,do you have to disregard your principles just to make the person you love happy? I answered, YES! without any hesitation because i was thinking, if you love a person you'll do everything, you won't think of your principle nor your pride. But he said, even if it involves your spiritual and social life? hmmm, then I changed my answer into a big "NO!" it's a different story, right?