You can't change someone who doesn't see an issue with their actions. (I would also add you can't change anyone anyway, but you can always change your own attitude, beliefs about and the way you respond to a person/their behaviour/a situation).
Amen to Truth! I couldn't have said it better myself with whats going on in my life right now, but such is life, the good thing about it is I know the truth even more so due to the defensive and offensive people
Don't make a fool of yourself being faithful to someone who isn't. Don't believe their lies & excuses. Believe their actions but most importantly, believe their habits. Be faithful to someone who deserves it.