Thank you, colleagues, for your responses. They are definitely making it miserable, including handing all my projects to others. My manager also told another director that he's having to reassign my projects because I'm experiencing burnout or dealing with personal matters. As much as that angers and saddens me, I've decided to not question him on why he's spreading rumors.
It's all a learning experience, and I decided to invest my time in looking for a job and get out of here as soon as I can. I worked with some terrific people at this company, so I know my manager does not represent the majority, but he does have some power in this situation.
Thanks again, and good luck to all.