answer:If your GF has BPD, then whether or not she is on meds, she shouldn’t be drinking at all. Her drinking is out of control (and was, is, and always will be beyond your control.) When she is not drinking and is capable of being in a conversation, you need to give her an ultimatum. Let her know her drinking and not caring about your things is not at all acceptable behavior, and must stop. And you will have to tell her it’s over if she gets drunk again. This will be hard for you, and you must realize you must follow through with it. But you have a choice, you can either give her an ultimatum and then follow through with the consequences if she doesn’t stop, or you can not be firm and keep dealing with her breaking your precious things.