I am sad truth in modern times. I can be cured in many cases quite easily. It only takes one caring person and a little patience. My best advice is don't let pride, shame or embarrassment stand in your way. Read it again. Read it again. Good.

I am what everyone has I am what everyone wants I do not exist after one vanishes I give

A little bat called for his dad, saying that there's a monster under his bed. To which the dad said; For the last time son, - is not under your bed!

I turn you green but I'm not paint, You can't feel me and be a saint, I'm a deadly sin that makes you covet, To gain your wings, you must rise above it

I am the word that ends the longest game, the final position staking out its claim, I trap the king in every possible square until no move remains and silence fills the air. I am not captured yet I am defeated, the logic of a battle fully completed. I come after patience calculation and art, the culmination of a thinking heart. I need no sword no army and no wall, just sixty four squares and the final call. What am I?