Need help. Threading water, must learn to swim.

[Sparkls]

I can (and am as much as I'm able since I'm still new and learning everyone's sitch and ropes), but in the heat of a disagreement, when one of us is trying to tell the other that they're wrong, is when I would fall apart. I would take it personally that he went out of his way to prove me wrong and yet I ended up doing the same thing , or worse just telling him his idea was stupid (I never called him stupid but he always took it that way and since I am educationally "smarter" it was always a sore point. I always apologized when I did that but that wasn't enough apparently).
Things like that, I can recognize as things I don't want to do and I can prepare for how I'd handle the situation but until you're there, it's all just talk.
Just annoyed I was never given the chance to do better, as I'm sure everyone here is. "Grant me the serenity to accept the things I cannot change...etc"