Hi there checo.
I was in a relationship just like you, I was with my boyfriend for 2 years, we lived together, and although I thought it was a general statement, my boyfriend used to say 'I couldn't live without you' or 'I'd die without you'.
However, we got older, and grew in different directions, he was very focussed on the past (we have all had problems) and I wanted to move on with my future. I met someone else, and decided that I wanted to finish with him.
I have also self-harmed, so I do know that it is a kind of release from any emotional pain and can sometimes be used as an attention seeking weapon.
I told him our relationship was over, and he was reasonably accepting, he did cry, but didn't try to hold me back, or fight for what we had.
A few hours later, I found out, he'd cut himself (I had known he was a self-harmer when we met) and he told me that he'd kill himself if I left him.
It was an exceptionally hard decision for me of whether to stay or walk away. I felt that if he did ever do something, it would be on my head forever. But if I stayed, it would ruin my chances of ever being happy, and that I would end up resenting him for it.
I chose to walk away, to tell him it was his choice, but he couldn't make me responsible, as I was doing what was good for my own health.
Needless to say, he never went through with it, he moved out, and now lives, what I know of is a happy live, similar to the one he had before we met.
I am now free of any pressure, and i have never, ever been happier.
Please, never feel responisble, or feel you have to stay with someone for their sake. As you will only resent them more everyday, and will ruin your happiness in the future.
I would speak to your girlfriend's family, GP or some kind of counsellor, you can still support her, but you can't be in a relationship like this.
My aunt always told me that out of a million people that say