So is he still working with OW??
You have to decide when enough is enough...
This is all on him not you. You are enough honey..It is him that is broken please do not let him break you too..
Call your counselor set up an emergency appointment.
If he is putting this type of stress and thoughts in your mind then by golly stay separated and 180 him and don't give a rats ass what he is doing. Focus on you and what makes you happy!!
For the comment I think sometimes they get older an they really do wake up and see the light..Sometimes
Maybe he truly does miss you???
Be happy and do things that make you laugh today..
Exercise drink plenty of fluids and laugh if possible it helps with depression.