well theres always exceptions to every rule
still it doesnt really sound like the healthiest relationship tbh
any scenario where one party is trying to guilt the other into staying together usually doesnt end well
ideally, provided one isnt a sociopath, its usually preferred to "let her down softly"
but it doesnt sound like that will necessarily work in this scenario
you might just have to be a dick and tell her to fuck off and leave you alone and that you cant fucking handle it anymore
just make sure its what you actually want before doing it.
theres usually no going back from that