Juliet,
Yes, you do seem to know what needs to be done. I had to re-read your post to make sure, since couldn't quite tell on the first one. You did kind of tie 'happier out of an abusive relationship' in the same sentence with 'dying for some, etc.'. Whew? Semantics can be telling an do not mean to jump on that but, whew.
It's hard to get up and out through the fear, dread, lonliness and pain. If there is a pattern- looking for that person to rescue you, falling into finding the need to be filled, sure as heck you'll end up repeating the abusive one and die on several levels all over agin- possibly for real at some point. Believe me, I had every reason to believe mine when he said he wished to kill me, also. I do not know where to start- but seeing the pattern, knowing it's there- you know it's not going to be different, no matter how much you just wish it to be, until you do stop it yourself. 'Just say no' may have been an unsuccesful anti-drug campaign but it'd be an awfully good anti-abuse one. Don't go there in the first place, if you KNOW that's where you're going to end up through being vulnerable. Can you get therapy? I know it's not always possible financially. so do not mean to be frustrating. Nothing worse than non-helpful advice. Therapy just can and will make what feels overhwhelming, do-able, and help stop the cycle here, help you rescue yourself, you know?
You're right to have hope. There's always, always hope, and things can change-of course they can! You kind of have to make them, however. The only other person who is going to step in, and declare to you 'they can make it all better', if you hand your life over to them-be resuced- is no doubt one of those I'm rather familiar with too, who would actually rather help you die a little.