I'm going to completely ignore my coworker
What did they do to derserve that?
My coworker is just too dumb and boring to be around even if he doesn't tell me anything.
I mean, you will have to communicate with them eventually. Work will be complicated if you try to ignore them forever.
I'm going to act all nice when I do talk to them and get on their good side.
In fact you should spend more time with them to understand them, maybe that'll change your opinion.