When a guy waits to hold the door open for a girl?

My friend thinks that this guy likes me from other signals we have noticed. Today me and my friend were walking down a hallway and he was a long way ahead of us. There was a curve in the hallway so he didn't see whether or not we were coming that way. He was standing there holding the door for a good 7 seconds before we got there. My friend claimed it was for me.. but is this some sort of a sign in any way? Honestly he did not need to hold the door since I was far away I don't think anyone else would have done that. So is he taking the extra step to be polite to me or am I over thinking it?
When a guy waits to hold the door open for a girl?
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