I need to read your whole thread before answering intelligently. But your initial response was telling; you are being used. That's not really in dispute, is it?
So the issue is why you were once willing to sign, and are not now, and if there is hope that this M is 1) worth saving and 2) likely to be saved.
What are your goals at this point? IF moving forward, or setting and enforcing boundaries matter, THEN DO SO. He's 37 y/o and can't seem to manage money or his legal status, that part we do already know...does he owe you money? If so, that would matter a lot as for boundaries and what you are letting him do. And what if you don't sign? Maybe he will find a way to stick around b/c maybe he'll get his act together but if you bail him out, so he doesn't have to get it together, and calls you only when ONLY when he needs it, is he really going to wake up and say "OMG, I NEED HER and therefore I LOVE HER and therefore WE will reconcile...." OR is he more likely to say (to himself), "good thing I can call her as my last resort, b/c she's needy and I can probably use her..." tough question but you do have to ask them...when else has he contacted you?
Regardless, do NOT answer soon. How long did he take to reply to your email? What is your rush to answer him? j-
M: 57 H: 60 M: 35 yrs S30,D28,D19 H off to Alaska 2006 Recon 7/07- 8/08 *2016* X = "ALASKA 2.0" GROUND HOG DAY I File D 10/16 OW DIV 2/26/2018 X marries OW 5/2016