Envy, Covet, and Jealousy - Oh, my!

I'm trying to stay focused on a bigger payoff than blogging, but I had to make an observation that has nagged at me for some time now.  What is it with people who want the things that you don't even have?  Like, the things you tell them you would like to have or dream of owning some day - those are the things they will suddenly possess and/or seek diligently to acquire.  Am I a bad person that it bugs me?  I have never been the type of person to be upset if somebody owned the same clothing item as me or even purposely bought something because I had it, but this caliber of possessiveness that I feel towards my desirables deserves its own name.  Alas, a name escapes me at the mo'.  I reckon the possessiveness I feel is akin to the same one feels when they share a prospective name for a future/possible child.  All of a sudden, because they said the name out loud, it's theirs and theirs alone.  That is how I feel about the things I dream of with those I trust.  Especially when those I confide my hopes and dreams in suddenly turn up with my hopes on their arms and my dreams on their feets.  (yes, I realize "feets" isn't a word.  Cut me some slack while I vent!)  Get your own hopes and dreams!!  haha!  It's like when you're in high school and you tell your very best girlfriend that you're in LOVE with the awkward, so-so-looking nerd in the corner.  Before then, she'd never noticed said nerd, but next thing you know they're "going around" and couldn't be happier.  How can any, self-respecting "friend" be so inconsiderate??  It boggles one's mind, namely my mind.  Maybe I'm petty, jealous, envious, and covetous.  Perhaps maybe I'm full of self-loathing and critiquing my own shortcomings on the world wide web.  Maybe not.