Friend Issues

So, I'm kind of at a loss and need some advice or something, though I'm sure others here have way bigger issues than I do right now.
I have a friend whom I have been friends with for just over a year. In the beginning, we were great friends and she helped me out a lot with my transition and acceptance and etc. But ever since my downward spiral, it's gotten.....weird.
Originally, we'd planned that I would fly out to her state and hang out for a week (mind you, I'm on the east coast and shes all the way on the west). I admitted that I werent completely comfortable flying (due to anxiety and claustrophobia and never having flown before) so I'd probably have my boyfriend come with me. She expressed that she didnt like the idea, would feel like a third wheel, and I would not be allowed to stay at her house and would need to find my own transportation and hotel. Ouch.

During this time, I hit a horrible depression and was deep deep into self harm and whatnot, and I just could not handle drama so I told her I needed to step away. At which point I had deactivated my facebook. THE NEXT DAY she's messaging almost all my friends to 'go check on me' and making them think that I had killed myself. WTF!? I woke up to 30 messages from frantic people thinking I was dead. Geez, thanks. That helps the stress level squint emoticon  She's constantly reminding me that she's still planning for me to come out west, Or she will come to my state instead which I'm not comfortable with. Everyone I talk to about my issues with her say she sounds like a jealous girlfriend. Meanwhile she always complains that she misses 'the old you' (meaning texting every day, happy, jolly, fake-love and happiness 24/7 which was all an act to make her think i was fine) and that I dont seem to care about her things anymore. And let's be honest here, I'm SICK AND TIRED of CONSTANTLY hearing 'im fat. I'm ugly. No one wants me. No guy will ever date me. I'm stupid. I'm fugly'. And there are only so many times I can say "no you're not, dont say that" before I just dont fucking care to respond anymore. I know that's sort of asshole-ish of me but ffs....it gets really really old. Every single time we talk, to me, it feels like we're fighting. But she insists we're not fighting, we're 'talking'. >.> omfg......I make a post complaining about drama and that I was going to bed, and she sends a message going 'didnt realize I was causing the drama.....". BI***, DID I SAY YOUR NAME?! DID I TAG YOU IN IT!? NO! SUCK IT UP, ITS NOT ABOUT YOU.

And when I mention that the constant self pity and whining and crap gets old and that's why I dont respond much anymore (because she gets pissy when I go quiet and so she leaves the convo) she then throws my depression-inflicted complaints back in my face. I cannot help but feel slightly depressed, stressed and aggrivated after ever convo we have. I just......I dont know what to do. I've tried to break it off but she goes bonkers and cries and tells everyone I hate her and goes into a depressive funk until her sister messages me and begs me to talk to her because she starts "crying every night". Idk wtf to do....she still calls me her brother and crap and idk how to confront the situation. 
On top of that--when I asked her "just to be clear...you only think of me as a brother right?" and she responds with "um........yes". Which to me doesnt sound convincing. Which she follows up with "Can I ask a question? Do you think I'd be good girlfriend material?" o.e like.....what? What in the what---I just--cant---process.....
Halp......

I've been warned that she's a stalker in the making but I know she's not. She is not a stalker by any means, and is 100000% incapable of harming me or anyone, and I'm NOT worried about her ever being anything situational. Dont get me wrong, I love her. Love her like crazy as a sister, and I care about her. But I just cannot take the stress anymore....I dont know what to do. In the back of my mind I know that she is 100% straight and KNOWS that I'm female from the waist down, so I shouldnt worry about her having a hidden crush on me or something. But some days I really legit' wonder if that's true or not. I dont want to hurt her feelings, anymore than I already have. But it seems like I'm hurting her ever single time we talk.

She does this "acting" thing where she will act out a non-existant part in a tv show. The 'character' has a name, background, etc. Which normally would be harmless. I mean, hell, I 'act' when I'm thinking up scenes for my books but it's only facial expressions, talking to myself in-character and whatnot. She's legit throwing herself around the livingroom as if in a fight scene and actually getting hurt doing it. She's messaged several times about having cut her foot on something or banged her arm or hit her head on something while "acting". Frankly I'm concerned, but she sees no harm in it. I want her to see a therapist and talk to someone but she refuses. I dont know what to do, guys....

Frustrated and At wit's end,

Warren