i think part of cfs is learning to put our own needs on the same plane as other's needs. you obviously are thinking of what you want and how to get it with school. i went to school and didnt work, using financial aid. i have had to defer payment on my loans because i cannot work enough to pay them. this may be an option for you.
the boyfriend sounds too immature to deal with a serious chronic illness. this is not a put-down, just an observation. you may want to just enjoy him occasionally without the heavy emotional ties that a serious relationship entails. do what feels good, and dont waste your precious energy on trying to change him; it wont help the relationship and it will hurt you. i think you already know this but are afraid to give yourself permission to enjoy the good parts and not expect more. if you are afraid of supporting yourself and going to school without his help, remind yourself of how far you have come without his help so far (your whole life before him).
good luck reaching your happiness