This topic is directly related to this: How to sooth relationship between roommate and my sister (who lives with us)?
Tensions between my sister/dependent and our roommate have continued to get worse, and have finally escalated to a point in which I feel we have to move. The problem that I am having now is if I should tell him that I am looking for a place even before a place is secured. He can be very impulsive, and I worry that if he knows I am looking he will take it upon himself to initiate our 30 days notice, or worse, before I am ready. It is also important to note that the roommate/landlord and I were close friends before moving in together, and I feel some modicum of respect is due to him.
So my question for you all is: How do I tell my current roommate/landord that I am looking for another place to live?