Sick of this cycle!

My fiance was fired from his job a little over a month ago. Ever since he was fired I've been fighting his "cycles". For the first few weeks it was him staying up until 3 or 4am and then sleeping in until 1 when I get home from my classes. Just last week he started being an Uber driver and now his cycle is falling asleep in the afternoon and waking up late at night like 11pm and staying up until the afternoon. It's putting such a strain on our relationship because I have to be up at 7am and when he's awake from 10pm to 6am playing video games, laughing into his headset and having the lights on in our room I'm so restless and constantly waking up in the middle of the night. And he questions me as to why I'm looking at failing the semester!!!(because his cycles have been affecting my sleep habits and it's hard to concentrate when restless) I just don't know what to do!!