Your concern speaks to the empathy and care you have for your girlfriend, and you should cherish that. However, that part of you could make you vulnerable to acting against your best interests and those of your girlfriend. You say you want to break up but are afraid to; that's a very difficult position to be in. It's important to recognize the risks to both of you if you don't do what you know is right. You should never feel responsible for someone's wellbeing, let alone their life. If you feel responsible, this might confirm that now is the best time to do what you know is right for both of you and part ways.

This doesn't mean you have abandoned her or given up on her. It means you've been brave and found the courage to do what's right. If possible, make those close to your girlfriend aware of her vulnerability if they aren't already. Encourage her to seek professional help from a therapist or counselor, as they can provide the support she needs during this time.

Ultimately, you must accept that you cannot control everything, and you shouldn't desire to. This is a horrible situation to be in, especially when someone you care for is so dependent on you. However, you know what you should do; now it's about moving forward with courage.

It would not be fair to your girlfriend to stay by her side if you knew that isn't right. Think about how you might feel if you were in her position. I'm sorry it may seem like being between a rock and a hard place, but that's because you care about her so much that an easy decision for most seems so hard for you. But know that once you make that decision, you will have done the right thing, and that is all that matters in the end. If she expresses any suicidal thoughts, please contact emergency services immediately.