Wife threatening for suicide.

Hi, i got married in 2016, it was love come arrange one, before covid came in things were going alright as me and my wife used to do job at different place, since covid came in we started living together as i was doing WFH since than, we used to fight on very small things before covid too but i used to avoid that thinking that living together may fix all of this, but since than we started living together our fight is completely on a different level, because of all these fights i even had an affair which was just till whatsapp chat and we met 2 times which my wife got to know, life was not normal earlier now it becomes worse as my wife threaten me on all small thing regarding suicide, and she commit suicide 2 times already, and when i talk about getting separated she start breaking phone, tables and try to jump from 15th floor, she abuse me alot whenever she wants, we have 1 year old baby girl and she even throw her on bed in anger, i need to know how can i seperate , as i dont want to live with her at all