Hi all! I read a lot this site, but this time I didn't find a reply to my question.

I am a very polite person, I explain myself when I have issues and I try to take in account how the other person feels in a situation.
But I am experiencing a great distress with an ILI my coworker.

He is super hyper sensitive to tone of voice... even if I am polite, could be that I am stressed or tired, and my voice changes accordingly... he takes it like a personal offense. I really don't know what to do... any suggestions?

He also says that he feels like I disproves him because of that but I really don't mean so!