I barely know him. Why do you think he hugged me and what did it mean if anything?

One time he was in front of a doorway and I asked him could I go thru.

Another he tapped me on the arm and said hi.

We have mutual friends and started following each other on instagram for a while.

Today he walks right up and hugs me. And a little small talk.

Don't get me wrong, I liked it. Dude was looking fresh, I never seen him look that handsome before. But just wondering if I should see what's up...
I barely know him. Why do you think he hugged me and what did it mean if anything?
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