Answer:
I can be found after you remove 6 letters from BSAINXLEATNTEARS
Things here are usually tagged with red stickers.
I am easy to see but no one likes looking at me. Without me there would be no you. I can make you complain or make you happy. But you almost always take me for-granted.
I am the black child of a white father a wingless bird flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me even though there is no cause for grief and at once on my birth I am dissolved into air.
At night I come without being fetched, and by day I am lost without being stolen. What am I?
The answer I give is yes, but what I mean is no. What was the question?