Why won't my boyfriend allow me to go to his barracks when people are around?

So I've been to my boyfriends barracks before and he was fine with it. Now he's getting out of the military in a few months and he's not allowing me to come while people are there. He will talk to me like he wants me to come over, but when I mention coming over he's all like "oh there stupid people at the desk" or "people are still here". It's like he's keeping something from me. Am I just over thinking it or what?

Why won't my boyfriend allow me to go to his barracks when people are around?
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