“he tries to beat me to the coffee maker to get his own, or hides his cup and I have to ask for it”
What does he have to do, hit you over the head with a 2 x 4?
STOP, repeat STOP giving him coffee. He made it very clear he doesn’t want you to do it.
The reasons can be many, one of which could be people gossiping about possible relationship between him and you (regardless whether you are female or male).
Your intentions may be pure, but you know where the road with good intentions leads.
The fact that you say you have to “ask for it”, after he hides his cup, shows you are overly aggressive, almost obsessive about it.
For everyone’s sake, including for the sake of your boss and your own, STOP giving him coffee.
This may sound a harsh assessment and advice, but this is how it looks to an unbiased outside observer.
I agree with this post #40.
See response 38. It’s only been the past few days that I’ve noticed his new attitude after almost a year of no problem. That’s why I posted this, to figure out the best course to follow and understand what must have happened.
Thank you for you input.