Why my friend feels the need to explain himself?

I have been a friend with this guy for the past 2 years. Last week, we caught up with some friends over for dinner. We liked each other but we never spoke and he chose to date someone else from his workplace. I respected his decision and I pulled away and told myself that we are only friends.

As he walked in to the house, he opened his arm for a hug and it was unusually long and tight, which led me to pull away quickly ( I don’t want to linger the hug to think I’m still attracted). We usually don’t do any greeting hugs, but I thought maybe bcz we haven’t see each other for 3 months, he opted for a hug.

The whole dinner he was staring at me and tried to get my attention, but I acted normally to see where he was going’s with this. He spoke about ending his relationship with the girl he was seeing and was telling us about it.

As I was leaving, he stood up from his chair and again opened his arm for another hug but this time it was brief and he was giving me a reason why he was hugging me. Then asked if we can catchup again soon as a group before his holiday.

I found it unusual for someone to explain why they are hugging unless he was reinforcing we are only friends.

Any thoughts?

Why my friend feels the need to explain himself?
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