I don't want to share a room with a mentally handicapped person
I'm trying to understand why you'd not want to share a room with a mentally handicapped person, what is wrong with them?
I will not tolerate sharing a room with one. I think it's important that I have my own room
I know that it can be hard to know how to treat somebody who is mentally handicapped but you should still not exclude them and not room with them. Maybe learn some more about it so that you understand what would bother them so you can avoid those triggers.
I'm fine with a mentally ill person in my room.
It's good that you're now more accepting of having this person in your room. It's terrible to judge anyone due to their mental capacities.