Why did he block me from everything after he left?

I spent the night with this guy, (no we didn’t have sex, just other things and talked a lot). I was sure he liked me! Then in the morning when he left, a couple of hours later he blocked me from all social media and also changed this twitter picture and added a new one (which happens rarely). I had accidentally unfollowed him from twitter and followed back this morning, then he blocked me.

I can’t contact him at all, so I asked my friend to text him as if its me and talk but he isn’t replying to that either. I am leaving the country in 3 days and i’ll be back a few months later. I just don’t think this would be the reason why he’d act this way though since everything was just alright.

Is it simply because he just doesn’t want me? Why wouldn’t he just answer saying so then!

I am losing my head, this is quite confusing and I feel insecure even though I don’t think anything went wrong.

Any clues?