Ex and suicide threats…

He’s not suicidal, he’s a stalker. Send him one message saying ‘I do not want to hear from you. If you contact me again I shall regard it as harassment. Do not reply to this message..” Keep the text and report any future contact to the police.

thats not how suicidal people generally behave. I agree with PP that he's trying to manipulate you.

For yourself and for the good of your new relationship you can't let him succeed. He is harassing you though, so involving the police is an option...

Call emergency services every time they make a suicide threat.

Had a guy do this to me once. Not an ex, but trying to get with me, I wasn't interested, ended up threatening suicide every time I wouldn't reply to him etc... Threatening suicide over me not wanting to be with him, which would leave me riddled with guilt and wondering I I should consider it.

It was his ex girlfriend who told me to quit getting sucked in by it and instead call the police if he did it again. I was too much of a wimp to do it though, next time he did it I called her. She called the police. Apparently he kicked off... Police turned up, he told them he was absolutely fine.... But he never threatened suicide at me again. In fact never spoke to me again after that. Thank god.

Edit: like above poster, just want to echo that you shouldn't not do anything. I too have a friend who had an ex threatening suicide. She ended up completely ignoring him. He actually did it, in a very public, extravegent hit-newspaper-headlines way... And blamed her in his suicide note. Fucking dick.

It's a common control tactic. I am one of many on here who has an ex who was 'suicidal'. I can report that he is happily around to this day, being an utter jerk as always. Ignore him.

I would say don’t ignore actually, rather call emergency services every time for a welfare check.

Edited to say that it’s more to cover yourself as I know someone who actually took his life after “warning” his ex via text.

There's a very high chance your ex isn't suicidal, it's just a tactic to get to you, try to manipulate and control you.

Block and ignore.
Or call their bluff, call the police, tell them this person has threatened to hurt themselves and have them go to their address for a welfare check, I'm sure they'd change their tune pretty quickly.
You're not the one guilty of harassment.

Ignoring them is exactly what you should do. Block every method of communication and if he turns up at your house, don’t engage and call the police. This sounds quite serious OP - it’s been going on for a long time. This man is harassing you.