Not be understanding toward another person's feelings, likes, and dislikes. No matter how different they might be from my own.
And if that person is special to me, why, I'd try to share some of their likes, within reasonable limits, of course you know, as far as music, colors, pets, clothing, etc. Just not...other things...nor totally changing myself for someone else. Anything I can do to please them...him...while still being me.