My boyfriend doesn't seem to understand the concept of sleeping. The past month he stays up all…

My boyfriend doesn't seem to understand the concept of sleeping. The past month he stays up all night until at least 6 or 7am, then sleeps all day. His sleep schedule is all messed up, which means mine is too. It's the most annoying thing in the world. I like to sleep at night and have my day to do whatever, not him apparently. 😠