Well, in a word, yes.
But not super unreasonable. Let me explain myself here. Ya gotta see this from the guys point of view. Hes finally allowed to go hang with his friends. Yeah, he should wanna spend time with you, but hes not looking at it that way.
My roomate is going through this with his much younger girlfiend of 18. Shes very clingy (i am not saying you are) and let him go out the other night and got all bitchy when he came home hammered. I was like, what you thought he was gonna skip 21 and the behavior because he's with you? Guys arent built that way. If they were, wed never have mid-life crises. Blame it on the Y Chromosome. She told me that she was gonna make him choose. I told her two things. 1) give him the gift of freedom to go out with his friends as your present to him. and 2) DONT make him choose unless you are 200% certain what his choice will be. Dont make him choose when theres a possibility that you might not like the answer.
Like was posted before, the booze thing will get old after a while for many reasons. 1) Sleep. Partying makes you tired. It will add up. 2)Hangovers. Eventually they get harder and harder to handle. 3)Money. Partying like a rock star is expensive. Its way cheaper to drink as a minor. all you pay for is an 18 pack or kick in on a keg. Just to get yourself loaded at a club is expensive, much less buying drinks for others. Its very easy to blow $60 on a nite on the town. (Interesting note: I spend more cash the cheaper the booze is. I have only dropped $25 at an expensive joint, yet spent $70 at quarter beer night. WTF is that?) It will wear off soon. If you try to prove apoint or get all demanding, it will be the end of the relationship. Guys dont deal well with being told what to. Nop matter how you present it, hes gonna see it as being told to not go ut with his buddies, he'll see you as jealous, he'll begin to resent the whole situation and you are on then on the love titanic. Not a good situation. Just stick it out. he'll be back to his old self in a matter of a month or 2.