I can’t bear these people who claim they are the way they are because of their past and who expect special treatment/understanding of it.
And what’s with the posters saying she’s unwell/maybe she means well/she clearly loves the OP yada yada yada.
If this was a man nobody would be saying anything of the sort, even with regard to the mental health aspect.
The relationships boards are full of posters whose ex’s send them emotionally manipulative messages, who claim they’re self harming/are going to commit suicide/who can’t live without them etc.
The fact she’s female doesn’t make that any different.
She’s an emotionally abusive, coercive controlling, manipulative cow who isn’t beyond using suicide as a manipulation tactic.
For the posters criticising the OP for taking the softly softly approach, likely it’s because of this manipulation because threatening suicide or having admitted to attempting it in the past is a powerful emotional tool. It’s very easy for those of us who aren’t doing the ignoring to say “just ignore her if she says that,” it’s far different when you’re the one being sent the messages.
OP this relationship is going nowhere. Not ever.
You need to be rid of her. Change the locks on the off chance she has a key to your house, tell her its over and block her number so she can’t send you any kind of manipulative shite.