God loves you because of, not despite you autism, and He won't "Shut down on you".
I have heard that autistic people see the world in an alternative way, so I hope that what I will write is a simplistic example, not an explanation.
In a physical way, if you buy a pair of shoes, you try them; same with testing a hard or soft mattress, because you want the best fit or the comfiest and you can prove to your self which is which. Well God wants the best souls in heaven, and giving in to the devil's temptations and the fortitude with which we bare the misfortunes in life are His shoe and mattress test. These are the sorts of thing that your best friend could see and write down in their diary and some liken this to St Peter with a book of your life's faults, blocking you like a revenue officer, at the gates of heaven.
In a mental way, you can't very well try an avocado or bubble gum, you have to believe something about them, the ripeness or the flavour. These are things in your mind, about which you can change your mind, that your friend can't see or know, to write down. These are God's 'here and now' tests, things like you forgiving your father and loving him despite all the things that were unkind or that he didn't do, or perhaps accepting that others seem to be more fortunate than you.
God hears your prayers, but He might be having trouble getting back to you because you are buried under piles of "why".
Jesus sent the Holy Spirit to be with us. If something goes well, instead of thinking "Clever me", say thank you to the Holy Spirit (Every one likes to be thanked), and if you need help, ask him, even if it is trying to find the car keys, a piece of paper that you are sure is on the table some where or that little something that you have just heard drop on the floor. He can also help with quite big things, like bringing one of your ideas that they heard of somewhere, back to mind as something that interests them.
I often hear people say "If I had proof, I'd believe", but the whole point about believing is that you do it without proof, and I have found that as a believer, God encourages me with little examples of proof, from the unasked for opening of the hymn book at the correct page or asking the Holy Spirit for a parking slot just before a car pulls away, to people being miraculously healed.
To sum up. Be grateful for what you have and be generous with what you have, be it forgiveness, time, comfort or a little money. "Cast your bread upon the waters.................God loves a cheerful giver"............As president Kennedy should have said "Ask not what God can do for me, but what I can do for God".
The Holy Spirit is here to help.