well if you know for a fact she'll suicide if you leave her, then that means she loves you for a fact(at this point of time). she regrets her mistakes as much as you are upset over them. so take that into consideration and do your best to forget about the times she cheated on you, because it seems that's what she wants. and if she does it again then let her die or figure out she lied about suicide the whole time. and talk to her about why she's recently changed, tell her to be honest. just spend as much time as you can with her... like 100% of your thoughts and priorities should be "being as close as you can to your loved one", and if she really appreciates you, then she won't be upset or depressed. everyone does make mistakes, but if someone is proven to kill themself if they aren't with you, it means they really want you to forgive them for their mistakes. and it means they won't make those mistakes again. but if they do, then it's all a joke.
For one normally when someone threatens to commit suicide if you end the relationship it is to gain control in the relationship possibly because of insecurity, I can't say for sure in this case as I don't know her personally. If she is already damaging her own body and is suicidal she will probably commit suicide eventually anyways ( I recommend getting some sort of help for her and reassure her that you are doing because you are worried, there are help lines for this sort of thing, or if she has any close friends). I also recommend reassessing how your relationship has been overall and consider your own feelings as you make your decision of whether to stay with her or not, it would not be fair to either of you to be in a relationship you feel uncomfortable with as it will only drag you both down and make things worse later. Try to talk things out with her also so you can both better understand each other, because sometimes girls just feel insecure or unapreciated by the smallest things. If you choose to stay with her she will require most of your attention, so be prepared for anything that might happen. Either way I would also recommend that she should be medically evaluated for anxiety/stress/depression disorder if she has not already.
I say all of this from my own experience as well as having helped friends through similar experiences.
I hope this helps.
Tell her if she cheats on u agian ull kill your self be very serious and if she cheats on u, thats mean she dont give a sh*t about ur life and u shouldnt care about hers either
This is seriously misguided. Only bit***s commit suicide? Get some life experience and some empathy. He should definitely not stay with her but there is some responsibility to be had for a partners mental health even if they're hurting themselves with their own actions. Lived through a couple similar situations with a girlfriend who was diagnosed bipolar, she may be actually struggling with some serious mental illness. Everyone has a right to be happy and everyone makes mistakes, don't throw your life away for someone else but also don't watch someone else throw theirs away if you can do something about it.
Wake up and smell the river dude. You say she's tried to kill herself 3 times...and she hasn't succeeded. That means she isn't serious about suicide. She's just trying to keep you stuck. Get out while the getting is good, and never look back.