It sounds like you still care about her and you're afraid she might commit suicide.
Normally I advocate to rip off the bandage fast, as that is the best course for action. But sounds like she's threatening you with her taking her life.
Another breakup method I've used before is to get her to be totally disgusted with you and lose interest and therefore she breaks up with you instead.
Find everything that would disgust her and start doing those. Also act beta, needy, weak, possessive, untrusting, clingy. This stuff will always turn off women eventually. Also do habits that would get under her skin, like being messy, dirty, being late, always whining/complaining, etc.
This is something you can always try.
