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Bataar, please know that God wants what's best for us. However, what God knows to be best for us is not necessarily the same as what we think we want. 

If you haven't been given the friends that you wish for, it could be that you've been spared from something worse, which, for now in this life, is still unknowable. 

Remember too that you have a guardian angel who is silently tipping you away from situations that are not in your best interests in the long term. Maybe you could have been being hurt or disappointed (even worse than you say you have been) by people you thought could be trusted. Or maybe it could have been the risk of getting too comfortable in worldly social activities that could distract you from what's spiritually important. 

Hear this: Every time in the past I've prayed for something specific that I thought was so very necessary, the opposite happened!  So I stopped asking for specific stuff. Then slowly, other good and better things happened, none of it what I had been asking for before. 

Add little spontaneous prayers during the day, before and after meals, before leaving the house for an errand and again when you return. It can be one of the standard prayers, for example the ones in the opening pages of a Missal. Or you can simply use your own words to ask God for a blessing as you go out and then give thanks when you return.

Finally, this verse from Psalm 94: "Today if ye shall hear His voice, harden not your hearts...." Remember that He is always speaking to us, though it's easy to miss it if we're preoccupied with other things.

The biggest problem for me, I think, comes down to my "special interests". For autistic people, special interests can be quite the burden as that can be all you want to focus on, or even think about. While I've definitely gotten better as I've gotten older, It's really, really hard for me to want to go out and do anything that's not related somehow to one of my interests or something I'm interested in in some way. Other than going to the store or runningi errands, I pretty much just stay home because I can't think of anything I want to do for its sake.
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Not sure why I'm posting this exactly, just trying to illustrate how my brain works I suppsoe. Can't really figure out a way around it.

Bataar, first and foremost, you're a CATHOLIC, are you not?

In all charity, please, try this: drop the autism angle already. You've allowed it to become a case of the tail-wagging-the-dog.

Maybe the diagnosis is useful for specific methods in the education of children, for vocational counseling that maybe someone should work in a back office and not as a salesperson, etc. etc. But when autism becomes a person's self-declared identity, it's a very dangerous thing.

What did people do in all the centuries before some modernist (probably atheist) "professionals" came up with the definition and started categorizing more and more children and adults this way? (Consider that there are lots of parallels between the academics who argue in favor of "neurodiversity" and those who argue in favor of "gender diversity", but that's another topic.) The label becomes a crutch that's more crippling than helpful.

You speak of your brain as if it's somehow separate from you and is what determines your daily beliefs and behavior. No, your brain is just an organ inside your skull. What is you is your SOUL. What determines your thoughts and behavior is your WILL.

Plenty people in this thread have given you advice about how to stay busy during the day. That's about using your WILL to put some of those pointers into practice. Have you changed your habits at all? Have you sincerely asked God to help you change your habits? No need to reply, these are questions for you to consider honestly with yourself.

Plenty of people in this thread have given you spiritual advice about how to ensure that you're putting Our Lord first in your priorities, and how to look to Him for guidance and fortitude. You are the only one who can quietly and humbly reflect on the state of your soul. Others can't do it for you. Look through CathInfo in The Sacred, The Library, etc. Do a web search on a traditional Examen of Conscience, print it out, put it in your pocket, and go over it daily. DECIDE that your "special interests" include what's most necessary in your inner life.