...I just hope she doesn't misconstrue my behavior and positive attitude as in some way pathethically hoping and waiting for her to "come around", 'cause I really wish she'd move out and give me my bed back.
It's quite possible she feels that way, that's why she's guarded, she thinks you are possibly trying to change her mind.
If you can come up with that possible scenario on your head, isn't it possible that she could be thinking the same thing in her head?
