Hi,
I was in a similar situation although my ex walked out after 23 years without any reason. I won’t go through the ins and outs they are on here if you choose to look but anyway it made me ill. Eventually I had to give in and go to the docs as I couldn’t eat, sleep or function. I am almost 2 years down the line and almost 6 months off the ADs I had. Things do get easier and I hope he gives you the chance to talk things through & work them out. I caved after 4 days the first time he left & did text, after all that time together I wasn’t prepared to give up just like that, the second time he left I didn’t bother it was just too painful.
Keeping my fingers crossed u figure things out