Do you think I should ask my fiancee to ask our roommate to move out?
Is the roommate bothering the two of you?
He's become very moody and won't clean up after himself.
If you're roommate is becoming a problem then you should ask him to move out. You should tell the roommate yourself that you want him to leave. Your fiancee should not have to take care of everything for you.
I'm a little intimidated by our roommate and I would prefer my fiancee ask him to leave.
Sometimes you have to take charge of a situation that's bothering you. Asking your roommate to move out should be something that you take care of. Your fiancee can be there for backup, but you should initiate the conversation with the roommate and ask him to leave.