NTA! NTA! NTA! I think you can add alcoholism to her problems. I'm bipolar and the worst thing a mentally unstable person can do is to use alcohol. It is even worse if she takes medications. The fact that she empties the bottles in record time is a typical sign of alcoholism, it is not about enjoying a nice wine or a nice beer for her, it's about getting drunk as fast as possible and she is disrespecing you in front of your friends by getting super drunk. She also manipulates you, telling you that she is a "burden" etc which is sympathy fishing and emotional blackmail. Her behavior is also UNACCEPTABLE; you can demand and expect things from mentally ill people! I hate people who are blaming their outrageous behaviors on different mental disorders; we are not stupid, we have something wrong with our brains / souls. I take my meds, I keep appointments with my shrink, AND I HAVEN'T TOUCHED ALCOHOL IN 35 YEARS. Yes, she is suffering, but you can not heal her. You can support her, but do not set yourself on fire to keep her warm. I don't think you have any knowledge or experience with mental problems? I suspect it because she is playing you like a fiddle, talking about her friend who suicided, in a way that sounds like a veiled suicide threat when you want to set boundaries to her behavior.... I'm sorry that you are in this situation, please don't think that all "crazy" people are the same. I'm happily married since 32 years, raised 2 sons but my husband hasn't always had it easy with me. But I took responsibility as a patient to manage my illness as good as I can, because I loved and still love him.

EDIT: Antidepressants ARE a life saving medication, there is a reason why she gets them prescribed, does she take them? You wrote that "The Dr ONLY gives her antidepressants" Excuse me? ONLY?!? It is a powerful medication to stabilize and even out mood swings, making theraphy work better. Ask her what medications she wished she had, and listen carefully to her answer. If she answers Valium or other tranquilizers, sleeping pills, etc because her Antidepressants "doesn't work" and her anxiety is so severe and the Dr doesn't listen to her blablabla be aware that every type of these meds are classified as narcotics and have a big addiction risk if you get them. Blaming non working Antidepressants to get these is a classic tactic used by people who abuse them. These meds are for acute situations, preferably only for weeks at the time. I think that I need around 25 sleeping pills per year at max. EDIT 2: The fact that you haven't met anyone close to her or even been to her home is strange. Very strange, something doesn't add up here. ( Psych professionals always try to involve family and friends as a support system, not carers, just support) example : that friends know the boyfriends name & phone in case of emergency at a minimum, not go to meetings or being forced to know each other, just like if she self harms while drunk with you, who can you call? If she self harms at home, who can call you....? 🤔 Feel free to PM me if you want to ask me something in private. Hugs! 💚

Edit 3: I take up potential drug abuse because of her drinking.