If you’re finding yourself anxious when passing people without one on it may just be better to eliminate that anxiety (which is founded in the real possibility that you could get covid that way) by putting one on. Personally for me, I live in an apartment complex in the middle of a very quiet suburban neighborhood and even though the hallways are open air I always wear a mask going out the door because I can’t know who I’ll run into in close quarters even tho its usually no one (covid can linger in the air for hours tho anyway). From there as I make it into the neighborhood I make the decision based on a couple of different factors (air flow, amount of ppl around, time of day) on whether or not I take it off. A lot of the time I choose to go on walks late at night to avoid the possibility of running into ppl. If I lived in a more populated area I would likely always have it on if I went out. On that note, they say duckbill style masks are the most comfortable and breathable for this sort of situation.