Help! How do extract myself from a 2 month delusion?

I have had to get a restraining order on my ex because of his constant delusions and paranoia. He is not diagnosed, but since these 'episodes' are all completely untrue and he 100% believes them no matter how irrational or even when show hard proof that its not true, I dont know what else it can be? I also believe he has a personality disorder in concert (attachment/abandonment issues that trigger the delusions). I the past these delusions lasted for a day or two but this latest one is well over 2 months. I have disconnected with him completely (obviously, RO) but he is continuing to pursue this ridiculous delusion to the point that he testified about it in the RO hearing yesterday, under oath! I know he believes it so it not quite lying, but Im quite frightened by his entrenchment in this and he is promising (and appears to be following thru) on legal action stating he has all kinds of "evidence" which is actually impossible since none of it happened.

Of course, over the 2 months the story have evolved and changed to fill in the 'holes' ive pointed out or proof that its false that ive shown him. He is spending money on forensics and lawyers and filings that have no merit or basis whatsoever. Ive told him so many times its wrong but he continues to persist and its terrifying. I think he is also creating fake 'evidence'. He tried to blackmail me into signing an affidavit admitting to the things he believes Ive done (that are all false) so that he can sue his someone (he "knows" im involved!", Im not, I dont even know this person!)

I know Ive done as much as I can but Im really freaked out that its going on this long and hes actually wasting his time and money on it. He hates me because of it, lies and bad mouths me to everyone and its not even remotely true!

I have no way to tell anyone that he need serious help or to get him to stop. I just want this to end!

I have only just joined this forum and Im wondering how you got on with your husband? I have been through a similar experience with my adult son who has made all sorts of accusations about his family abusing him in all sorts of ways. He has made numerous complaints to the police but thankfully, because we had managed to get him to seek help they didn't pursue it because they realised, after speaking to various people he had mentioned, that there was no truth in it. How did you get on?

Its been 15 months now and my son is still delusional and the situation for us, his family,is very difficult indeed.