@briarrose, My wife and I went through a mental health crisis with our son in his early teen years and he's now in his 50s and still living with us which is a blessing. He learned how to maintain a routine with his medications and he's able to hold a job which helps him with his daily interactions. What really helped us get through the dark times was a National Alliance on Mental Illness (NAMI) Family Support Group - https://www.nami.org/support-education/support-groups/nami-family-support-group/. We met other parents going through similar situations and were able to both get and offer help from each other in finding resources.

The NAMI website has some information that you might find helpful here:
-- Family Members and Caregivers: https://www.nami.org/your-journey/family-members-and-caregivers/

I know you mentioned he is refusing to speak to you. Have you tried just sending him a card or letter just to let him know you care for him and leave it open ended hoping he will contact you?