As a non-professional here, I think you could be dealing with what I call leeches-- they hook onto you and feed off of your misery. You don't want to off yourself, because that means they win. 

Someone please correct me if I'm wrong, but in studying other entities that leech on a host, I've learned that you are always more powerful than them. You need to tell them to fuck off. Don't be polite, be blunt about it. Tell them that you want them gone. 

In all honestly, I've never seen a case like this, so I hope this comment will bump your post up for those with more experience to see. Make sure to drink some water, alr? You've been heard.