Sometimes im silent, and i keep to myself. If someone approaches me, i talk to them. Its like im here but not there. Its like im there but not here. At times my mind wanders off to a faraway place, and it’ll take time before you can reach me. 
It’ll take minutes, hours, days, weeks but do not worry ill come back to this world. Its just that at times, i need to be by myself to just open my thoughts and think. You see it is not a bad thing, but i suppose others see it as depression. For me, it is not. Because im not sad, im just myself feeling at ease.