You are being used. You are being disrespected. But you can handle those things for the time being, they will not kill you and they cannot hurt you unless you let them. Put aside your pride and your ego and be honest with yourself about what your goals are. Once you have your goals in place, then what steps are you taking to achieve those goals. If setting a boundary is needed, especially if it is a 180, then do so with thought and deliberation. Not with anger or desperation.
Right now the storage situation can wait. I'm not saying it can wait if you are tripping over her stuff and it is falling on your head whenever you open your closet door. But is the storage issue the best example of setting a boundary to establish respect, or maybe there is something you can do that will be more productive. Think about what you want. I think the storage thing is going to come across as petty. There has to be something else that is more important to you, that you can address when you are not emotional, something that is more closely tied to your goals. Think on it.
