Depends on what you mean by "dark side" nobody should have to take bullying.
Not saying that is you, but that is some people's dark side.
If your dark side hurts others then it is up to you to change it, nobody can do that for you.
I think it is a fairy tale to expect someone to embrace everything bad about a person, they may be able to accept that dark side and they may not. It isn't all about one person in a relationship it is suppose to be about two people who compromise and try to solve these issues together, some cannot do that.
The thing is only we can work on our own issues with help if needed.