Don't Compromise Yourself to Make Him Happy

No matter how much you love the man (or woman), never compromise your morals or your feelings on certain topics to make him happy with you. In small cases, be prepared to give a little, however. Realtionships are based on love and compromise. Nothing will survive if no one is prepared to give at all. But it shouldn't change you into him, or make you feel inferior because his beliefs are different or because he says they're the right opinion.
It's very easy to lose yourself in a relationship, and possibly forget the true you. Only you can keep that shining through. Love them, trust them, and enjoy what you have.
Keep your true self vibrant. :)