Agree to disagree
Fights, disagreements, tiffs - no matter what you call it, remember that it is inevitable that you and your loved one will get into arguments from time-to-time. It's normal and part of every relationship. While our ego can get the best of us at times, try to remember that it is not important for someone to be deemed as the person in the wrong. Agree to disagree. Your relationship is too important to lose over a petty disagreement.
Arguments give us a chance to see both sides of the spectrum and provide us with the chance to improve our relationships.