I am going insane !!

So me being a 21M, I am currently pursuing my engineering degree. So while I was in my first year of engineering I had a huge crush on a girl who played all innocent and kind and that's what I liked the most about her, her innocence got me. She gave all the hints to me even gave me rose did my work as well told me everything about her past, her ex told me all of her phone's passwords and everything all by herself. Now comes the interesting part she asked me atleast 10 times if I like someone and when I confronted she neither rejected me nor did she accept me. She always cussed her ex and used me as a cushion she used to flirt with me and all. After sometime she came to me crying about her ex I consoled her actually even after breaking up she used to chat with her and expects me to console her I said fu*k this I won't be doing this anymore either u block him or me. She blocked him and promised me that she won't be talking with him anymore. Now coming to the present she wants me to act like her bf give all my attention to her and if I don't she gets all sad and makes a baby face as if she is bout to cry when I try to distance myself she does the same again and blames me in the end. She won't even accept me as a bf but won't even keep me as a friend she wants me to give her attention to care for her as a bf does. I am tired of this shithole she blames me for everything and I take the blame too and say countless of sorries tbh I dunno what do I even do now. If I ask her will u ever accept me as ur bf she says dunno and says for now I don't want any kinda relationship with anyone. Tbh I have put in more than enough efforts really more than she deserves did everything as if she is my kid whom I'm raising. Plz advice me what to I really do now? Kindly help me guyss !!