I feel like a rug has just been pulled out from under me

but the more I think about it, I have no reason to.

i was just informed that within the next year, before I move out with the man boy who i will marry and bare children for with in the next 5 years, there is a possibility that I will have a roommate.
in my cozy, 2 bedroom, one bath,common area might have to be shared with my other uncles 49 year old sister who has a mental disability...and that has nothing to do with why i feel....upset?
i been living in my own space for 5 years now, and all of a sudden, i might have a roommate. my biggest qualm is having to share my bathroom. my space to get all impurities out.
i'm kinda freaking out. there's a good chance she may be able to stay with her mom in the assisted living facility...but there's a bigger chance that'll be a no go.
her mom is still trying to sell her house, which may take time enough for me to already be moved out.i really hope that is the case.
i kind of want to tell the boyfriend that we might as well get an apartment, but it's hard as fuck to find someone to lease month to month...so...i might as well suck it up and wait it out.

i feel really selfish for feeling like this..but. i like my space. i like my privacy. i like having my own little world to disappear to.
and there's a chance all of that could be taken from me.
(when we live together we'll have our own bed and bathrooms, to transition)

ahhh. now i feel uncomfortable around my uncles.
and now i'm crying.
i'm fucking 22 years old and i'm upset about something so juvenile. wonderful.