Put his mail where he will see it and stop taking care of it. You're enabling him so he doesn't have to run his life and has more time for OW.
If he doesn't have insurance, does it impact you? This is detachment. Don't be his mom. A lot of women lose their men because they go from being girlfriend to mother. It can sneak up on you, because we're good girls who do what we're supposed to, and they seem to want you to do it.
Have you ever tried to meditate? There are many short meditations online that you can try. Just 5 minutes can bring amazing calm.
M 16 yrs, WH62, P54 3 adult blended kids EA 11/13, BD1 6/14 PA fall 14, BD2 2/15 Piecing 2015, BD3 12/15 Separated 4/16 WH moved OW in 5/16 Divorced 6/15/17