Need advice - may be life or death

If the police or attorney get involved, this will help especially if he has any priors for violence or domestic violence. Document everything. What time he calls,etc.
You may not need this info right now, but it may come in handy at a later date.
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The answer to 1984 is 1776! ~ Alex Jones

When asked what did you give us?
"A Republic, if you can keep it" ~ Benjamin Frankiln

letter from an attorney? Most people are really intimidated by any
communication from an attorney.

I'm not a big fan of "law enforcement", but in this instance, you need all the help you can get.

I would contact your local Police Department, It can't hurt, and maybe they can do something to help.

Other than that, definitely call this guy, and call him out on the carpet.

If someone threatened me, my response would be, "you wanna piece of me boy?", "bring it on".

The Police can't be everywhere at all times, and at some point we have to defend ourselves.

Most often we have to defend ourselves.

Call him, call him out, and let him know that you are not afraid, even if you are afraid.

No sense worrying about idle threats and things you can't control.

Stand up to a bully, and 9 times out of 10, he will back down.

we deal with this stuff all the time in my family, after a phone call and some strict words they stop

You need to take whatever steps necessary for your own daily peace of mind. You don't want to live in fear for the rest of your life, choosing tables at a restaurant based on whether your back faces the door or not.

You've had plenty of suggestions here, but only you know yourself.
If she is indeed the one that you firmly believe to be your life-partner, then you need to take whatever measures to come to terms with this potential threat.

If it were me, I'd want a full background check on the guy to help determine the level of threat he may or may not pose. But of course that doesn't guaranty anything. However it may help with your future decisions on how to deal with this.
And it can be done online without his or her knowledge for a fee.

Don't rely on her knowledge of his history, she likely may not know all of it.

Also how long has it been since you and her have become an item?
If this is all relatively new(to him), then it may just be nothing but talk.
His acceptance of the end of their previous relationship will naturally take some time.
But if we're in month 6 of him wanting to do you harm then I would place the threat at a more severe level.

Good luck with it.

If you know the Lord share the Lord with the guy. If he comes after you put him away.

For some reason, we're expected to know every law that exists in America & in our state so we don't break it. We're supposed to know this when we're 18. There's no litmus test for them, as in the 10 commandments or rhyme or reason. C.U.R.E.

before you get married. When you get there, chances are its going to remain the same/ be worse. Please keep in mind that when you get married, you become eligible for divorce & that divorce overcomes marriage in 1/3 of American cases. If you're living apart now & will be living together when you get married there's no reason not to think this will not increase since you/ her will be living in the same house. As a matter of fact, when you're married, you never get a break from each other. Marriage is not the perfect solution to a relationship b/c if it was, divorce wouldn't occur. It could be that if you get married, then divorced, the problems will be more. I'm not trying to dissuade you from getting married. There are people who live together & have children w/out getting married & break up & get along better than divorced couples b/c they haven't had to live through a divorce. I'm sorry if you don't care for what Ive said.

Before she does. She's a gamer.

Jokes aside, I'm with those who see RED LIGHTS.

You can't change her, you can only change yourself. You've become engaged to a woman with some BAD BAGGAGE, and that is YOUR mistake. You can play games, risk your life making this your wife in living hell... I don't know if you can overcome your lust for her to get a grip and understand she does not have your back, nor is she 100% for you by playing these games. It's time for some hard ball.

I'd take a "pink slip" and go on a solo vacation.. see family or friends for a long weekend and not talk to her.

When I did arrange to talk to her again, I would give an ultimatim. If she can't give this guy up, you deserve a living hell for sticking with someone who is apparently using you to get back to the one she really LOVES, (but she's so mad at him) and the father of her child.

This is a BAD connection, the sooner cut the sooner you find someone you won't hear about baggage, but you will hear them praise you, defend you, in this case, she should have told her ex to tell his lawyer about it and have the attorney contact her if there's a problem.

Good luck to you.