Only 20?! !! !! !! !! !! !!
Damn yer young dude.
As someone who was also desperately depressed, partially about being alone when I was your age, here's a big tip for you:
give yourself time to grow into the person you're meant to become. You need time to grow into your own skin, and learn more about yourself.
Despite having been in a relationship from when I was 6-11, my first sexual relationship didn't happen until I was almost 26.
And I can tell you that the experiences in the relationship taught me a lot about myself.
Sure, you're going to see many around your age in relationships; good for them.
Here's the big difference: you're Autistic, and chances are that also means you will have a lot more to offer, especially in terms of mental comprehension, and the love and devotion for your mate than they ever will. Now, not everyone can process that, and it may scare off a lot of folks...which is part of the reason why you have to grow more into your skin, and learn more about who you are.
This is your opportunity to find out what works for you, and what doesn't. But when you are ready to "show your hand", and give everything you have to offer, holy damn will it be an experience.
And I know you're thinking right here "well that's easy for you to say, you were in a relationship at least". That may be true, but we weren't on the same "page" at all, and I was pretty much cheated on and lied to from Day 1 (and no, I didn't know this at the time). So essentially, I got something out of my experience, and she never did. To say she didn't understand what she had with me would be an understatement the likes of which I don't even think the internet or the entire power the universe holds could withstand.
Her nephew, in fact, is one of my closest friends, and he recently took a picture of her 2-month old baby when she was visiting her stepmother in the hospital after surgery. I actually read a comment she posted on the picture he posted on FB, to the tune of "look how big he's getting!", and...I remember I used to hear people around me say that all the time when I was younger.
Most of these people, however, were very small-minded in retrospect. Now, I'm not saying that commenting that someone is getting bigger is small-minded, but...well if you knew her, and you saw her comment...it would make more sense.
The reason I bring this up is because most of the people who always used to make that comment in my life, as I grew to discover, were often very small-minded folks who'd never matured much in life.
They don't want a whole lot out of life, and never set particularly high goals for themselves; often instead just saying "how much better things once were" or something like that.
And you know what? These are not the type of people who will go for a guy like you because they won't comprehend what you have to offer.
Take my word when I tell you what you have to offer is not gonna be appreciated by the masses, but those who do appreciate it will never feel luckier than to know they have you, especially when you find the right one 