has anyone ...

Has anyone been in a relationship where you just aren't happy.. Because it's a toxic relationship, and you just can't get away. 
I'm not asking for you to say leave .. which I have tried many times in the past four years .. I'm saying your unhappy .. the sex is nothing to you anymore.. that you don't even look forward to it anymore.. it's more of a chore .. 
you just aren't happy... 
Tell me your stories.