I should say as well, that one shouldn't have to please anyone else but their own . She isn't a good friend to you and you have no reason to suck up to her, she herself is rude and aggressive to anyone else attempting to be a friend to her.
If making her happy is what you want, then note that she herself also says nothing can make her happy, therefore you risk trying to please someone who can never ben pleased. And if they say they are pleased, is it because they are happy or because they got their own way?
Think about this... I'm not trying to stir up trouble, but rather pointing out the obvious issue going on here. This is a girl known to lie, to tell people off for showing her support or supporting the truth. You can't "win" here and believe me, you won't. There are millions of people on the net, you do not have to give in to an oppressor who will emotionally blackmail you to make you feel guilty. Its not healthy for yourself.
ITs all part of that big thing about "growing up" and having to make a hard choice. In the end, if she ends up alone its not your fault, but rather her own as she is pushing everyone away. Never stop being there for her as loneliness is a painful thing and knowing someone is there even in the darkest of times gives someone hope. But note that its not good for you to mistake being a doormat for being a friend and its not selfish to be tough as sometimes it pays off to be the stronger one, as if you are weaker then her you don't have the strength to toss her the line when she falls into a hole, metaphorically speaking.
Think about it, most of my user subscribers are from dead accounts yonks old. Remember what I said about internetters coming and going? Yes, they came, they put up a gallery and went without taking it down. I'm not bothered, I have friends in Real life anyway and therefore a social life beyond the internet. I used to think it was really important everyone on the net loved me, but honestly...?
When I went through the tough times in my life the ones in real life cared for me and the net ones didn't give a damn. If I had stayed like GothicEmEmily, I would be dead by now and given up. I got lucky and was rescued, but things didn't change. What did change was I got up, went to a RPG club and played "Vampire the Masquerade" and "Pathfinder" and through a common interest, made friends. I don't think about offing myself anymore and though I have down days where it comes back to me, I can say I know what does and doesn't work. If something doesn't work out, you move onto something else... Simple as that. And part of making friends is about allowing yourself to give up some time to what others want so in return you can get what you want.
I'm not saying about abandoning her, far from it here though because even I don't agree with that. As I said... Loneliness is painful.