Hey. I am feeling lost and quite overwhelmed. I know you can't diagnose online, but I want to be able to understand my friend. I thought she might be Bipolar, but I am starting to think she could have BPD.
I was dating this girl 5 months ago (same sex) and we hit it off instantly. But I noticed she started to be moody and would change from being super sad to extremely hyper. She also seemed very sensitive and completely misinterpreted things I'd say or my actions. For example, once I was very tired and stressed when I went to her house and she accused me of being rude and judgmental towards her housemates. But later calmed down and realised she had read too into my behaviour.
She then revealed to me that she has "mental issues" and is very hurt from a recent break up. And that she had a stormy relationship with her ex and they kept breaking up and getting back together. She also told me she used to be addicted to speed and had a recent emotional breakdown. Of course this wasn't good news to my ears. She didn't tell me what she was doing to help herself though.
But we agreed to go slowly. One night she told me she is bipolar and likes to "eat bricks". But then said she was joking. I remember thinking it was a weird joke! Not long after, she became more moody.
Anyway, we ended up having a fight 2 months ago and she then didn't want to see me. She kept flaking on me and saying she was "busy". And i was about to go overseas on holidays. She then said she wasn't ready for anything serious but still liked hanging with me. It was confusing but figured we could just be friends. Anyway, when I returned home- she messaged saying she misses me. I got annoyed and asked her why she avoided me and now misses me. She immediately lashed out and said she hadnt' avoided me and that I called her a "bipolar junkie" 2 months ago. I had only once referred to her bipolar joke SHE made about herself. So this was a lie and twisting of what I said.

She then told me I say "hurtful" things to her but couldn't give examples. And for one week we didn't speak. Then I tried to call her and she missed my call and told me she was just finishing off a project but hopes I am well and all smiley. It was odd how she seemed all chirpy now. And I called her the next night again and left a message saying I never meant to upset her and wanted to clear up I never called her a "bipolar junkie". I had to clear this up as it's serious to accuse someone of saying such to you.
She then lashed out again but over text saying "I thought we could be friends but you make me feel terrible and you keep insulting me and bringing up the bipolar thing. Your apology was even nasty. I don't need this. Goodbye".
I was stunned. I replied saying "huh? I tried to apologise and keep the peace. And also clear up I never called you bipolar. I don't understand this? How have I hurt you?"
Then she changed and said she didn't know what she meant by the insults but that I keep bringing up the "bipolar thing" even though it upsets her. She then said my "tone" is very abrupt and I make her feel like she's "always doing something wrong". I didn't get it and she ended by deleting me off Facebook and saying "Ok I'm f&cked. Goodbye".
I tried to ring her the next day as I was really upset. I left a message that was rather shakey as I was distressed and confused. I told her I never meant to hurt her and that I didn't understand how I had made her feel so upset and what am I missing here. And she then texted saying "I'm devastated I upset you. It wasn't my intention. I will call you this week. I've had a lot of wine and not at my most articulate".

I can't understand these extreme change in moods. It's like she lashes out and sees nastiness in things I say that isn't even there. She also twists my words to make it look like I insult her but afterwards seems to realise she made a mistake and feels bad.
I am actually quite fearful of her but I do care about her. So when she called me back, I decided not to take it. And I texted her saying I think we should not talk right now as I may unintentionally upset her and I don't want to do that. I added that I hope we can be friends one day and hope her week goes well.
Do you a) think this sounds like someone with BPD b) think she may now feel rejected by me suggesting we don't speak at the moment?