How does one cope with something like this when they're living and sharing a bed with someone? I've personally always been fascinated by rigid self-maintained s

How does one cope with something like this when they're living and sharing a bed with someone? I've personally always been fascinated by rigid self-maintained schedules and routines. However, especially for me it's near impossible to maintain anything but loose schedule because my girlfriend does most of her studying at home and usually goes to sleep only a few hours before I'd prefer to get up, and of course watches the TV right when I'd prefer to go to bed. Due to the current situation, there's no distinction between living room and bedroom in our flat, so in essence we hang out in the same room 90 % of the time anyway, so it's impossible to isolate from each other for sleeping or even studying really. It really feels a shame for me.