Feeling Anxious about him

why the change? That is what I am asking myself. For the past week, my husband has been super nice to me. He gives me compliments,is very attentive, and seems to be in a very good mood. We have been married for three years, and to honest we have had arguments about his usual way of being distant.I have complained about him playing video games until late so that there is no time for cuddling in bed, or not sharing things with me that are going on at work. He is usually this upbeat only after having sex (or when he wants it) or after having a few drinks. While I of course enjoy this, part of me wonders what changed? Why now? For example, lately if I say I am cold, or am thinking of having a glass of milk, he will go and get a sweater for me or pour me some milk. Of course if I were to ask he get it for me. But to wait on me like that without me asking, just seems weird. It seems like he is trying too hard to please me for some reason. And this is causing me untold anxiety because I don't understand what has changed. I am autistic and any change causes me anxiety even if it seems positive. I would love feedback from others.