Well... the Skeezyks doesn't really know a lot about the specifics of autism... or any other mental health issue either, really.

So I can't speak to whether or not how your friend is acting is related to being autistic.

But my personal opinion is, it is always tenuous territory when we begin trying to analyze what might be going on in someone else's mind.

I pretty-much just take people at face value. And if I don't like what I see, I move on.
Personally, it seems to me, if your friend hasn't responded to your texts, then he has no reason to berate you for not continuing to text him. I have an internet friend... my only "friend", so to speak, in the whole wide world.

Sometimes I don't hear from him for days or a week or more. I don't concern myself with it. If I hear from him... fine. If I don't... I don't. If I never heard from him again... that's the way it goes... & vice versa. I'd wonder what happened to him. I'm certain he'd wonder what happened to me if I disappeared unexpectedly. But neither of us would lose any sleep over it. There are more important things to worry about.

If I were your friend, TheBoredOne, I would not be mad.