pfm, i had the same feelings as you after i got away finally from my abuser. men triggered me even if they weren't invading my space. i was paralyzed with fear. giant panic attacks. needed help for this. took this to my T. we delved into ways for me to acknowlege my fears, do a mental check-am i safe-yes, then nothing to worry about. if no i'm not safe remove myself from this person. (in your case not as easy however.) slowly desensitized myself to a large degree but sadly can't let go of fearing i would make the same mistake again. T told me abusers can pick us up in a crowded room with a neon sign on our forwards, "pick me, i'm vulnerable." still working on how to change that. have learned boundary setting. helps a lot.
which brings me to you...tell management. they are required to stop this. if they don't do it they are violating the law. it's sexual harressment plain and simple. they are held accountable to fix this. do look in the meantime for other employment. and set your boundary with this person. "it's not acceptable to me for you to harrass me or approach me in this manner." be firm even tho you may be scared. don't get into a conversation with him re this boundary. advise him you'll take it to HR if he continues. then take it to HR if he continues and file a formal complaint with them. keep a copy in case you have to go up the food chain.
you nor anyone else has to put up with this. emotional abuse is just as harmful as physical abuse, imo. hope this helps.