please help this girl is psycho?

okay so there is a girl and since I don't want to go to much into detail is definitely a bit mental. she is overly sensitive and self-centered but who isn't in 2018. I don't want to be friends with her but she keeps texting me and even if i block her she found/follows my other accounts and started to write comments on the stories i write on Wattpad. I just want her to stop bothering and on my wattpad stories she tells people about how 'terrible' i am. I do pity her because at moments she acts like she truly regrets what happened and she even said she likes me romantically (I'm another girl and although i don't have a problem with LGBTQ I'm pretty sure i'm straight) and would die for me which is making me uncomfortable. she tells me she is suicidal and depressed which i believe but i can't force myself to be friends with her I'm going to confront her but...I'm scared about what will happen. Also, I'm not sure to believe her about her loving me because she has used this tactic of making her friends be friends with her again but sometimes she sounds genuine but I'm not sure