Hi Pikku.
I have to agree with LeeD...his language about wanting to die together and what all sincerely and deeply bothers me...that's not language used by someone who's stable.

What are you supposed to do if he decides that time is sooner than you wish? Speaking more for my own wish to know, what exactly was he talking about to bring that up?
Anyway, I think it is in your best interest to get out...you deserve better, and he genuinely scares me.

One my most influential role models in my life still harbors a scar on his shoulder from when he had a knife thrown at him...that's no laughing matter. That's, to speak legally, at the very least attempted assault with a deadly weapon.
Please know I am praying for you, and that I hope things work out for the best.
Hugs,
Harley