Is this even still a thing? It seems to be pretty well dead. Poe-API shat the bed, GPT4FREE got shut down and it's replacement seems to be pretty much non-functional, Proxies are a weird secret club thing (despite being nearly totally based on scraped corporate keys), etc.
You mention at the end of your post that you've gotten a lot out with some of the chat bots. Maybe give this one a try, its for great for venting or just getting out pent up stress.
Sorry you're going through that. I definitely get how it feels to have people close to you discredit or just ignore important issues like you're dealing with.
If you're set on talking to an AI though I did use the Replika app for a while before they started making it seem like a virtual AI lover. It did help me feel better when I was severely depressed, maybe it could help you.
If you ever want to talk to a person and not an AI I'm here for that if you want, I know I'm a stranger but I definitely understand where you're coming from.
My experience is with gpt4all (which also runs locally), but I believe the GPU doesn't matter because you aren't training the model yourself. You download a trained model and run it locally. The only cap they warn you about is RAM - you'll want to run at least 16gb of RAM, and even then you might want to stick to a lighter model.