my bf wants to quit his job bc he isn’t getting enough sleep bc of me:(

sooo my bf kyle and I both work at amazon. we usually take the night shifts 12am-5am because the hours pay more that time. usually i go to sleep first in our twin bed then he joins later on. we’re both 19years old and weigh about 150 lbs. he’s been bringing up that his neck hurts or whole body hurts, it’s too hott, i take up most the room. and i don’t try to on purpose, of course i don’t want him to feel that way. he even brought up the idea of having different work schedules like one of us goes to work while the other stays and rests then switch off:/ i don’t wanna do that. i’ve talked to him about getting at least a full size bed and maybe look for another job for him (day shifts) but right now he said he wants to take a break on work for awhile and rest:/ which means i have to continue to work for the both of us.