I agree with OSDAD, but also disagree.
I think that is more common when he comes home for Winter break. T-DAY they are all excited to hang out together for the 1st time since they left.
For the SA/SMC/ROTC cadet. It is the 1st time they come home, and now when they are hanging playing X-Box, this is when they realize the true fork in their roads.
The traditional bud for the past 4 yrs in HS, can't wrap their mind around the fact that they can't sleep in until 10. Traditional freshman may not have a class until noon, so this is unfathomable. They don't get that they need permission to go home for a weekend, or that if they want to eat lunch at 11, 12, 1, or 3 because they are hungry that is not an option.
It may become a teasing point, where your cadet gets the light bulb in his mind, that they don't get it.
The breakdown between these friendships usually occur after T-Day, during Winter, and than spring. When he says I am going on a cruse this summer, and they all think cool, what cruise line, where are you going. Only to be told...the Navy. Their thought process is what fun is that? His thought process is I can't wait.
Let him decompress. This is the 1st time in months that he will not be required to make his bed, leave wet towels on his floor and go out, or raid the fridge at 1 in the morning while he is skyping.
You giving him space is the best gift you can give. You demanding, desiring or expecting him to wanting to hang with you because he missed you as much as you missed him, will only cause hurt feelings.
Just be thankful on his first morning home you can walk in his bedroom and see him sleeping in his bed. Be thankful that you mutter under your breath the wet towels on the floor. Come next Monday you will want those wet towels.
Whatever he does or doesn't do will not matter next Monday, that welcome home hug will matter.