Wait, the title of your post is that it wants to kill you, and…
Sorry, what part of any of this is OK? Or are you just a glutton for punishment? 
Get rid of it before it gets worse, which it will as it gets stronger. You think it wants to kill you, I’d say take it as a serious threat and deal with it like a bad smell.
On the other hand, as well as the parasite info you want this. Lesser entities lie their faces off all the time to get what they want. It’s interesting but kind of pointless trying to talk to them and get anything real out of them that you can reliably act on without making it worse.
I wouldn’t even go for understanding or trust in this case, just banish with prejudice.