I think ex's are a fact of life :-) My husband and I have been married almost 20 years, probably longer now than he and his ex were and she and I get along fine but she's still quirky and calls him too much.

It sounds like your boyfriend is acting fine around her and knows what's what; I'd tease the people she works with, something like, "And have to give up this wonderful job?" and just laugh as if it doesn't bother you and act confident like you know she's nuts and they know she's nuts. . .

You can't control other people. Besides, her being a pain is just pushing your boyfriend further from her! My husband doesn't like involving his ex in our lives LESS than I do! Let her hang herself with her crazy behavior. Eventually your boyfriend's non-response will get boring to her and she'll bother her current boyfriend who will be her ex by then, LOL.