ive felt the same before and probably will again at some point  you definitely deserve a spot on earth and in society think of people who are responsible for oil spills pollution waretc they have made mistakes and caused so much damage if all you did as a person was pick up one piece of trash and dispose of it just once than you made the world a better place and you have definitely done more than just that   one of the things that make me feel better when im like  this is volunteering ill walk the dogs at animal shelters or play with the kittens i hope you feel better soon