how do i end a longterm relationship

This person just sounds like an edgy, attention-whoring shitlord. Dump and move on, nothing is gonna happen. To quote the late Mitch Lucker, "Pull the trigger, bitch!"

you need to confront your partner and tell them how yo really feel. If you don't then things are only going to get worse for both of you. At first you might regret leaving them, but you can't stay with someone that you're not into it only makes it worse. If they don't want or even try to understand your explanation then you just have to walk away. You are not the bad person in this situation it happens to people everyday, just remember the most important thing to remember is tell them your true feelings

This might help you sorting your mind about it:
http://captainawkward.com/2011/11/05/question-130-my-partner-is-depressed-and-i-am-drowning/
In the comments, if you search (ctrl+f) for the word "threat", you'll also find advice for dealing with the post break-up suicide threats. Same for the comments in this page, about something different yet similar:
http://captainawkward.com/2012/06/25/276-277-278-a-three-for-one-stalker-unspecial/
It's basically about informing authorities immediately as a strategy and reminding yourself about the manipulative nature those kind of comments have.

if only it was that easy. without him, i dont have a place to live

Try to find your own place to live first, so that you have a place to go to. Just be honest and tell him that it's just not working out. The truth hurts, but they say "honesty is the best policy". People tend to say all sorts of things to keep someone in their life, it doesn't mean that his words will turn into actions.

i have no money and no one else. im looking for jobs but if i wait long enough to save up money i think im really going to lose it

he prolly knows you are dependent on him that's why he knows he can manipulate you/ emotionally blackmail you. I agree with all the advices above, but if you can't sort things out for it wouldn't be possible to get out anytime soon. I would suggest that you wait for the right moment, keep your sanity, wait for the job and save up, or borrow maybe? be strong enough to hold on through all the tough days until you are financially able to leave him.