When I read your post it reminded me of my son.
The gaming and the fishing and a few other bits. He's Autistic. It sounds like your sense is strong enough to know this is highly likely.
The gaming can be regulating and dopamine seeking in a way it isn't for an NT person. The assumption from pp that his capacity to game and fish means all is ok, is so wrong.
If you had enough money I'd suggest quite a few things. I get the impression you won't be able to finance it all and not many could. Will it solve all the difficulty? Probably not. But might it offer some hope? Possibly.
With enough money I'd be really particular and wouldn't budge on what I wanted him to do. I know you aren't his mum but this would b come non negotiable for me in the end nd. If he consistently refuses all this, nothing will change.
First of all, an assessment for Autism and ADHD. Yes it is important to know. If ADHD was in the mix ( it often is), how might ADHD medication change things for him. I've researched this extensively and when it helps it really helps. But he has alot going on I accept.
A psychiatrist prescribes medication. They are also usually the experts in supporting people who are Autistic/ ADHD. I just booked an assessment review to discuss meds for my son. The lady is an expert psychiatrist in Autism and ADHD and can prescribe. She will have a good understanding of the conditions, all the meds and what to try in the toolkit. The appointment cost me alot. The NHS are out of reach tbh for us and do know their expertise is incredibly limited if you get the wrong person.
If you don't know you're Autistic, I wonder how counselling would even help you. I imagine it could make you worse.
If you know or highly suspect and accept you're probably ND, one would be best seeing an Autism aware and experienced therapist ( a counsellor) , maybe a man would work better. Going alone would probably be the best thing for him. Couples therapy feels unsuitable to me as something that might not help get to the core of all this. Couples therapy won't get rid of his depression either.
This is a fair bit to take on and it's so understandable if you think oh fuck this.
I remember my dad crying. He had a severe mental health crisis after returning from war. I was scared but I feel nothing but compassion as I grew. I've cried in front of my son because i'm very unwell physically. I have pain that no human would experience. So I have to just be real and say it's ok and tell the truth to my son ( 13). E.g I'm in alot of pain and crying sometimes helps me because after ive cried I feel a little better. I'm sorry if it upset you. ' And then he's absolutely fine.
I don't think the guy is being manipulative and people are too quick to say LTB etc.
It's so understandable if you can't continue the relationship. No one could ever hold that against you. I just think context is important. You sound like a very aware and compassionate person anyway.