Living with someone with bipolar ... AIBU

[LittleMissUnreasonable]

Aibu for this, I'm just at my wit's end at the moment.
I live with DF (dear friend) and have done for the past 9 months. She's low income so doesn't pay rent but contributes to all bills, food etc 50/50. It's not for lack of trying, DF has a part time jobs with unreliable hours.
Now she suffers from PTSD and Bipolar which I'm extremely sympathetic about, however I have depression and I'm struggling to know how to cope here :(
DF has had a very 'up and down' fortnight where her moodswings change hourly. She goes from ranting about people to laughing and joking, until something else triggers her off. She became triggered the other night when I told her to not worry about rent payments at the moment. She saw this as a sign to text her (very well off middle-class and unsympathetic parents) asking if she could have a short term loan from them to contribute to rent. Her DParents didn't like this and as good as refused. I took her out for the day and it was frankly exhausting (she didn't want to be out despite not telling me this till after the trip) and I eventually snapped and broke down in tears when at home.
This prompted her messaging her partner (who she had been moaning to me about for 2 hours) and saying bshe was stressed about rent payments. Her DP thought I was being unreasonable asking for it when she's unwell (I didn't ask for it...). Her parents have been heavily suggesting she moves out and offering to pay for a flat for her.
I just feel after one breakdown I had, she has made people we me as being unreasonable including her partner and parents who probably think I'm some sort of monster. I'm just exhausted pandering to her every need without knowing if I'm helping or hindering her.
Does anyone know how to help someone with bipolar as I'm clearly doing it very wrong :(

You aren't 'doing it wrong'. You are trying your utmost to help your friend but probably just aren't equipped to do so, as many people aren't.

You are depressed yourself so your friend's situation will impact on you and probably make you worse. I feel it would be better if she moved out into a flat her parents provide for her whilst you concentrate on your own health.

I don't know if your friend is taking medication but she probably needs to be under the care of her local MH unit who can monitor how she is doing.

It is laudable to help others but we have to help ourselves first otherwise we won't be strong enough to do so.

Imo take a step back is the best thing for you.
Let her dps financially support her. It really isn't your responsibility. Let her bf be her sounding board.
Sounds like you need one for yourself not to just be there for her.

If her parents are offering to help her to get a flat I would encourage her to go for this as they might be more generally supportive. You have great intentions but sadly aren’t able to help her at the moment.

One of my best friends is bi polar, I feel you

Thank you for understanding. I think it's just the whole making me look like the bad guy when I've housed her for free for months, and essentially listened to rant after rant. I know it's part of her condition but it really is exhausting. So thank you for those who have replied :)

You haven't done anything wrong. In fact it sounds like you've gone above and beyond, especially housing her for free.

For your own sake, I'd really urge you to end this living arrangement, whether that means moving out yourself, or telling her to leave.