Want divorce, how to handle?

I got marriage 1.5 years. and Believe me she is Psycho. Here something to share. I never understand how I managed 1.5 years with her with knowing she is weird. I have seen weird people in life but not this kind of). Before 1 month ago of my marriage I got a new home on loan with my brother as Co-applicant. (50% EMI I have to pay). After marriage she started to dislike my family and we got separated. (I am paying EMI + Rent). then she started to dislike my friends. I have some childhood friends (since 3rd grade), so for her I disconnected with them too. Month ago she started to dislike her sister and mother as her mother and sister wants to come to stay with her but she declined. Neither she wants to go to her mother's home. She don't like anybody except the people who follow her. (Whomsoever gave advice or didn't agree on thoughts is a bad person). 4 month ago, when I started to discuss things with her, she tried to drink floor cleaner finail (She didn't take single sip). The person I am staying is having something is unbearable. She refuse to cook if i won't agree on her thoughts. If I am not in mood in bed she think I am not more interested in her. What to do? I am afraid what if I will send a notice and she will take wrong action. I don't want to spoil her life and not mine of-course.