Is AUTHOR wrong in the post ? POST : She's been an acquaintance for 2 years and recently became a good friend. She shared her diagnosis with me as well as her life story (raped, mom passed, dad isn't around and family treats her horribly).

I feel responsible for her because she has no one. However, her mental illness can be exhausting for me. Especially because she becomes a little mean to me (e.g. calling me boring when I don't wanna drink, calling me sick because I'm thin and making me feel guilty when I do other things that don't include her).

I visited her in the psychiatric hospital after her suicide attempt and was there for her as I knew she needed it. 
But now I need some time for myself. WIBTA if I took that time to regroup? I feel like I would be abandoning her.