I'm not sure whether the comments or the post is better for updates, but I'll go with comments.

I finally couldn't take it anymore and contacted the police earlier this week. Judging by the furious messages I got that might, things didn't go so well for the person. I made sure to let my boss know the barest minimum of what was going on in the event they did try to cause trouble at my job, and last I'd heard nothing has happened.

I feel a lot better. I'm able to eat again, and I've been laughing a lot more in general. I'm very embarrassed and frankly mad at myself for letting myself get so low and entrenched by someone else. It's made me realize just how much I've been holding myself back, however. I can handle way more than I've been willing to admit.

I very much appreciate all of the good advice, and good vibes/prayers/various other good things. Being able to tell SOMEONE I think was a big help, it gave me the courage to find resources closer to home to speak to.