Do you want to be right or do you want to be happy?
Excluding your partner's perspective and insisting on your own, no matter how you put it, implies that being right is more important to you than how your partner feels and more important than the well being of your relationship.
Soften up. Take a deep breath and give yourself the chance to see the situation from outside.
Actions you can take:
1) take 3 deep DEEP breaths
2) step away from the conversation: take a walk, sing a song, dance...
3) let go: remember why you are with this person, look at a picture