Okay, so I'm going to try to be totally honest with you, but nice... If he told you he wants space it means jus that... HE WANTS SPACE... You told him that you were going to kill yourself if he broke up with you which is a MAJOR RED FLAG. You are trying to hold him hostage in a relationship that he no longer wants to be a part of, that is pretty fucked. I don't know the history, but chill the fuck out... As for you, time alone might also be useful in order to grow and reflect on things. An end of a relationship does not mean the end of your life, try to calm down and not do anything rash or extreme. You doing rash and extreme things will ONLY GUARANTEE that he leaves in the long run, he might be there for the time being (out of guilt) but I 100% guarantee that he will leave afterwards. I personally would not stand for this emotional terrorism (that's what it is). The only way to even have a possibility of getting him back is to chill the fuck out, reflect, listen to his concerns, have him listen to yours, and achieving an agreement on the future of the relationship.

