How close can someone stand to you? well if i don't know the person i would flip out like back up a little i need to breath no one needs your hot breath on the back ok. but if i know them i wouldn't my if they stand close but if their in my face i would say step back. when people stand to close to me when it's hot i just get disgusted because i don't wan't no one's nasty sweat on me.so some can stand at least three inch's away from me.