Hello,
It is so sad to read these stories about people being treated badly.
It might be understandable that, when you have problems in your private life, you aren't able to be positive and friendly as much as before, but somehow there is a limit to that as well.
It is also sad to see that people, that have been working at one place, had a good employment etcetera, must leave and go to work somewhere else because of that behaviour.
That is not right. (and, speaking for myself, I wouldn't leave, at least not until the other part had realised and understood what pain he/she had caused).
The reason I would try to solve the problem, at the workplace, is that if one person is allowed to behave how they want to, without any major opposition,he/she will continue and make life miserable for someone else.
Besides, dental nurses needs to be seen as good and valuable co-workers, not something one can shout at and hector.
It is not very pleasant to stay and work in an "infected" environment but there must be some help to get. I am not a lawyer or so but I do know that some behaviour is not acceptable, in fact unlawful.
I really hope you can sort things out somehow. That would be best for all involved.
Please, let us know how you are getting on.
MLA