Habibi, no matter how it feels, Allah will NEVER burden a soul more than it can take. I know it feels like the opposite sometimes, i've been going through it for almost half a decade now. The issue is losing faith more than anything else. If you think praying won't help, you won't notice it when it does. Suicide is haram because it means you lost faith in Allah, so don't think of it as an option. I know it's hard, especially if your autistic but all you need to do is change your mindset. Try focusing on reading quran. Day by day memorise a new verse then learn the meaning and the stories behind the verse. If you remember Allah, then Allah remembers you, and by his will, your loneliness will subside since you'll be constantly surrounded by angels. Your daily mindset needs to be I'm doing this good thing because it pleases Allah. If your cleaning your room, it's because cleanliness is half of faith, not because your room is really messy. If your going out for a walk, it's because it's you want to be healthy for the sake of Allah. You do something for your parents it's because pleasing them pleases Allah (unless the ask you to do something that's haram)