It pains me to read your story, man. I'm sorry that you are facing this.

I think there's a reason why you have so many upvotes and no one dares to try to give you advice on what you should or shouldn't do.

I'm sure there are some of us who can relate to this type of problem, but these types of matters have no absolute resolution or "proper" way to handle them. One reason for this is the fact that every such situation always has its own unique set of circumstances. An outsider to your situation can never see it in proper context because they can't live your shared experiences, we can only infer details based on how much you divulge.

Having said that, my one piece of advice to you, as a man speaking to another man, is to never allow yourself to be a doormat -- be a man. And, if you haven't been all the man that you're capable of being up until this point in the relationship, now is the time to free it and be it.