(((moor))) I, too, am sorry you are experiencing this.

I think it shows that he is unstable and unpredictible right now, and your decision to separate might have been a very good one.

No one is ultimately responsible for another's actions. Whether he is really "responsible" for his actions or not depends upon his state of mind and with what disorder he may be suffering. I hope they don't just dismiss his actions as an acute reaction to a separation, but keep him and help him.

I disagree with feeling guilty, that implies you did something wrong. Even if you both had "words" that isn't cause to kill oneself. Keep yourself safe in this, and don't allow his actions to guilt you back into his arms. He obviously needs serious help, and you probably can't provide that.