Private room wanted. Easy professional woman

Very Independent woman looking for a Private Room in a Stable apt. Not looking to be a rolling stone. Prefer something longer term. I am very busy and often out of the apt, just want a quiet, kind safe environment to come back to at the end of the day. Non smoking important.
I am a vegetarian, but eat most meals out. flexible and easy and prefer someone who is mature enough to not be too picky about small issues. Communication is easy for me.