3 years is along time. Maybe just catch up on the phone and in the general hows life been conversation mention that you broke up with your husband 3 years ago and ask him how his marriage is going. If he's still married then its a personal decision with 3 people involved, if not then sometimes things are just ment to be in life. My Grandad married his 3rd wife in his 80s. She was his first love at 17 but he was Catholic and she was Protestant so in those days in England they could not be together but life found a way many many years later
Hi JS, welcome
I would message that guy. I wouldnt tell him about your marriage breakup as that might send him a green light.
Ask him directly about his marriage like this...
Hi Bill, how are you going. What'snew with your life? Has things changed at all at home?.
If he avoids the question dont progress with any of your own developments. Ask him again...
" hey Bill, you arent telling me much about your home life. Whats happening."?
If he is still with his wife, back off and move on. If he wasnt happy he'd have moved on by now.