My boyfriend hugged another girl from behind while next to me?

We were in a crowd coming out of an amphitheatre. This girl was next to me in the aisle between the seats and my boyfriend was behind us. All of a sudden he hugs her. It lasted for a second, it was one of those oh- I- just- love- having- you- around type of hugs. She's a friend of his, but they're not that close. I felt like sh*t in that moment because my boyfriend felt the need to hug someone, I'm standing right there and he hugs someone else. Am I reading too much into this?
My boyfriend hugged another girl from behind while next to me?
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