I seem to be blunt in my responses because I'm always on my phone so I apologize if this comes across harsh but you have to back off
My husbands number one thing he noticed was me living my life without him. He specifically recalls certain events, times, interactions that I was distant (with the advice from the wonderful people here because there was no way I would have thought to do it myself). I was so worried I would do something wrong that would make him never come back. There is not one thing that will make or break the outcome of your M.
In the beginning I tried so hard to have reasons to talk to H via text - bills, kids, etc. He didn't want to talk to me and me talking about those things reminded him of the life he was escaping. Why would he want to come back to that ?? Nag nag complain bills etc (in his mind lol)
Anyway the best advice I can give you is what doesn't feel right to you but he will notice. Stop calling. Stop texting. If it's an emergency then contact but a TRUE emergency. Separate yourself from his life. Let him be free and see how 'great' and 'improved' his life is without you.
It took my H a few months to realize I wasn't the problem. But it took me backing away and letting his choices blow up in his face. With me out of the picture when he was still unhappy (surprise surprise) I wasn't there to blame.
I was bad at GAL by myself but my boys and I always were out doing stuff. My friends and family saved me... Stay busy. Find out who you are, become the person he fell in love with. Day to day nonsense takes away the person we once were. I bet you can find that person again.