What does it mean when a guy rests his head on your shoulder?

saysrae
So I feel like this is kind of an odd question but once I was sitting next to this guy who I was friends with (who I also liked and sometimes flirted with but nothing more). He just randomly rested his head on my shoulder for a few minutes and than sat back up and was like "sorry it looked comfy" (which he's taller than me so I don't know how that would be comfortable for him). So like could that have meant anything at all? I don't know, I just don't see guys use girls shoulder as a pillow all that often..
What does it mean when a guy rests his head on your shoulder?
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