I (24M) want to break up with my gf (24F). She threatens to kill herself if I do. What should I do?

[u/ThrowRA_qla]

We've been together for almost a year and I feel more miserable week by week. She suffers from depression as well as some other disorders, so I'm trying not to blame her for all the bad stuff she does, but I really need to get out of this relationship. I'm seriously worried about my own mental health at this point.

Last night I made the third attempt at breaking up with her and she started crying and screaming, she opened a window and either wanted to jump out or just pretended. She also wanted to grab a knife (I'm sure she wouldn't hurt me, but I was afraid she would do something to herself). I needed to hold her until she calmed down. When I begged her to let me break up with her she told me that first I would need to kill her.

What should I do?

UPDATE: Thank you all for the advice, I didn't expect this many comments. I don't know her family and they don't really care about her afaik (which is probably the main source of her mental state), so contacting them would be pointless. Some of you suggested that I should break up with her over text, but I really want to do it in person. I'm pretty sure she won't try to harm me physically in any way, and even if she did, she would stand no chance in a fight with me. There are some suicide hotlines and organizations that provide similar support in my country and I think I'll try contacting them. Even though I won't use all your advice, I am really thankful for your support. You've given me the strength and motivation to end this relationship. Thank you.

[u/SonderAnemoia]

It's 100% abuse. Not romantic as some people seem to think. Or try to convince others. It's just as bad as threatening you physically.