I've gone through a lot of this myself except my boys are young adults which makes it easier, but the Mama Bear part of us never goes away. We want to protect our cubs.
I had to learn that H was not going to live according to my expectations and that my expectations of him had been at the root of my unhappiness for a long time-unmet expectations>anger>resentment>bitterness
I have a joint appt with H and S19's therapist coming up in a couple of weeks and I've had to closely examine my motives in suggesting that.