As someone who knows several people who have committed suicide when I was younger and too self-absorbed to notice something was very off, get her help.
She may hate you for a time but I assure you it’s much better than living with the regret of doing nothing.
When I found out my (now ex) long term partner was sleeping with my (now ex) childhood bestfriend and spread some very malicious lies about me some time ago my body pretty much shut down.
Despite the fact that she was both physically and emotionally abusive to me while we were living together, which was bad enough as is, what may have been worse was that nobody believed me because society likes to rile behind the “damsel in distress”, so I lost almost all my friends because those two toxic people knew how shitty they looked in that situation to everyone and wanted to counter it by saying unforgivable things about me.
Never mind that I would rather die than ever actually do what they claimed I did to someone; none of that mattered because men can’t be victims, apparently.
Things like that really show you who your true friends are, and if not for them (and the companionship of my cat), I probably would have done something very, very stupid.
I’m now exponentially happier and am dating someone who I’m quite fond of, to say the least, and a big part of it is thanks to the people who helped me.
Please find her help, even if she’s angry now she’ll be eternally grateful later.