<human>: us living together is new, she most recently lived at her parents house. 

we'll be in the living room watching tv and frequently i'll be doing homework and she'll just get up and not come back. i'll look down the hall and the light in our room is on, and then i look a few minutes later and its off. i mean, for all i know she got up to go to the bathroom or wash her face, then when she doesn't come back for a long time, i can just assume that she went to bed. what if i wanted to go to bed with her...

isn't this strange behavior? i would assume that she would say "i'm going to bed" or "i'm going to go lie down now"

i don't know how to approach it because i don't want to seem like some sort of control freak who needs to know every move she makes.

Summarize the given text in a few sentences.
<bot>: when my gf and i are in the living room together, she doesn't notify me when she is going to go to bed, she just leaves and never comes back.