Moose72, I am sorry for the loss of the relationship with the child you knew. It sounds like it meant a lot to you.
I have been in support groups that NAMI runs telling similar stories several times. You are not alone. If interested here is a link to their website.
Find Support | NAMI: National Alliance on Mental Illness Every program they offer as far as I know is free. The Family to Family program is a 12 week program that shows us what is happening in people as they go through changes that mystify us.
Having others who have been through this could be a help. Hope you find the support you are looking for.