I’ve been in a relationship for almost two years. We had lots of ups and downs. Last year she met another girl at work, she seriously cheated on me but she's not telling me the full story and keeps saying that if she tells me, she will lose me. She also kept saying that she flirted and had a thing with her because we had problems and that she won’t survive if we break up. I can’t leave her. I'm afraid she will harm herself. We are still together. What should I do? The relationship is getting toxic!
You need to leave this relationship for your own health and happiness. Someone who cheats on you, refuses to tell you the truth, blames you for their cheating, uses threats of self harm to manipulate you into staying, and makes you feel that the relationship is “toxic” is not someone you should be dating. Period. Make a plan to leave the relationship as safely, cleanly, and quickly as possible.
Ultimately, you are not responsible for her actions. She is. If she makes the choice to harm herself, that’s on her, not you. The fact that you are concerned with her well being means you are a good, kind hearted person, and that’s normal. But don’t let that completely hijack your instincts and control everything you do. There is a wide space between “needlessly cruel” and “doormat,” and I invite you to step into that space as soon as possible.
Connect her with appropriate resources (a local crisis hotline would be a good one), and then disengage. If she is on good terms with her family, you can give them a heads up that she might need extra support. But don’t get caught up in being responsible for her, relaying messages, checking up on her, etc. Let her know you are no longer available, recommend that she reach out to family, other friends, or a crisis hotline, and then turn your phone off or otherwise do what you need to get some space. Consider also enlisting a friend of yours to help you maintain this boundary and give you a neutral, supportive space to land while you ride out this breakup.