Is AUTHOR wrong in the post ? POST : So I will tell the story from the start to my current day. 

I was hanging around in discord doing useless but fun stuff when I noticed this one girl. She was bad at the game in which the server is based on, so I ridicule her gameplay in front of some people. However it turns out that she's there at the server. Knowing this, I apologized to her about the ridicule and deleted all the mean shit I said to her.

(yep, I possibly have separate asshole moments. I am not a good person) 

So after that is done, I noticed that she keeps sending nudes/ inappropriate pics to the server. I scold her about it, and in response she showed her arm which is full of cuts. I know she had self harmed herself, so me and a friend of mine started talking to her to hopefully help her get back in track.

My friend didn't have much success, but I had too much success. We ended up talking for hours like a new couple :p. I was very amazed by the level of openness she had with me and gradually I made her the center of my attention and to be honest,  my life. 

Our chats started running dry after 2 weeks. We simply ran out of things to say.  At this point I was desperately searching for stuff for us to talk, but ALAS the talks starts to dry up.  We then settle into this kinda "quality talk" where we just converse brief but fun stuff sometimes 

1 month into our friendship, I started liking her (I know it's completely irrational) and you know it just motivated me to invite her to talk to me at all times. One day she goes missing for 1 day and we didn't do any talks. I was very worried for her and my thoughts went to really bad stuff. Finally she responded.  I was very happy that she responded.  We talked a bit and she said she had a one night stand with a guy named Alex.  She hoped she and him become partners.  This devastated me but also made me a little bit relieved, since I hope this Alex guy will help her with her problems as well.

And then come the holidays....

On the holidays our talk started to dry up even more, we barely find anything to talk about.  I am aware that she's getting bored of our talk. I was unable to contact Alex at all. He couldn't speak English at all so I couldn't discuss with him how we can help her. During this period I became very worried of her and I became a very negative and emotionally unstable person.  I decided to contact one of my acquaintance to go help her as well. My acquaintance (we call her Eve) is very happy to help her (we call her Kris). 

Just when Ever talked to Kris, she spilled the beans. Alex was fake and Kris created him just to make me relieved. This moment made me not crush her anymore,  but I understand and tried to look past that. 

I won't bore you with the details. Me and Kris just have bigger distance over the month. At this point me and Eve also discovered that Kris also lied about their talk,  and asked me to investigate it. It's true. She claimed to have real sword fights and post a picture from Google as evidence.  My distrust of Kris grew. 

Then one day I discovered that Kris is not open to me anymore.  She started telling her secrets to Eve instead of me unless I asked her about that specific topic. At this point I gave up and I want to leave her be, I don't want to care for her again.  It hurt me in a lot of ways. I also don't want to pretend to be her friend. It is disgusting to me,  and I choose to just be clear about it than having fake smiles plastered over my face when I don't care what our talk is in the slightest. 

For fairness, Kris has a lot of fucking problems in her life (although I cannot be sure they are lies or not). 

Her problems are:
-her parents left her since March 2018 (like, they dissapear. She only got monthly allowance from them) 
-she didn't have any friends in her college
-her brother moved out 2 weeks ago ( she said it's good but IDK. Seems pretty bad for me) 
-she was forced into taking a major she didn't want
-she self harms
-she often has depressive thoughts and dark humors
-some of the server members are against her since she still occasionally posts nudes and shit. There was a fucking big drama over this that Eve also got whipped up on
-she had an abortion in a rape (I myself believe she had a one night stand and have accidental pregnancy but I cannot know for sure) 
-she often drinks heavily 
-she works in a bar with strippers around and servicing drinks to men and occasional women there
-she had some sort of disease that got her bedrest some months ago, and now she is forced to take blood tests every 3 months for a year

Am I The Asshole? Also, what should I do? 

TL;DR

I am exhausted mentally and emotionally from a friend. I wanted us to not be friends anymore,or at least for me to not care about every single thing she did,but I don't want her to be left alone, especially since she had a lot of life/mental problems