JEALOUSY- The Worst Feeling in the World (Or at least one of them)

What is it about jealousy that we hate almost as much as embarrassment? That burning envy we have for what we don't or can't have. It's one of the worst feelings of the world, and it drives us to do things that most people would never do rationally. The only way to really get rid of it is to ignore it or remove yourself from the situation.
What does jealousy really feel like though? For me, it's a burning feeling for something I don't have. It's usually got anger or sadness mixed in, depending on the reasons for being jealous. Seeing someone with more can also drive me to try and do better so I can have what they have though, so sometimes it can work for good. But often it brings me irritation and anger to the world in general.
Thoughts? What does jealousy feel like for you?

Character Sketch: Eveline Gardener

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  Name: 
  Eveline Gardener
  Age: 
  27
  Physical Description (feel free to find a picture):
  (Above)
  - Location (Where does he/she live? Do they like it there? Why do they live there?:
  She lives in South Bend, Indiana, several miles south of Notre Dame University. She moved there to attend college at Notre Dame University, and has lived there since obtaining a degree in Psychology
  Goals/Desires (What does your character want?):
  She wants to see her brother Mike live through the cancer he's been struggling with for the past three years.
  Weakness/Insecurities:
  She'll do pretty much anything to keep the people she cares about from harm. If anyone messes with them, they're in trouble. 
  She often bases her opinions on most things on what other people think.
  Peanut allergy.
  Pet Peeves:
  Dogs annoy her. They pee on everything and they get their hair into everything.
  She's lactose intolerant, and it bugs her when other people eat chocolate in front of her, because everyone loves it but she can't eat it.
  People who think they're right about everything.
  Strengths:
  Very loyal.
  Good at analyzing situations, although she will often use what others have said to do so.
  Very athletic (or at least she was). She was a big track athlete in High School.
  Fondest/Saddest Memories (What happened in the character’s past to shape them into who they are today?):
  She found out about her peanut allergy by eating a peanut butter and jelly sandwich and several peanut butter cookies at school when she was seven, and it nearly killed her.
  She is not married. She had a boyfriend six or seven years ago who died in a car accident, on his way to a date with her where he had been planning to propose. Since then, she has not dated anyone else, and no one else has pursued her, fueling her constant heartache over being unable to find "true love."
  Religion/World Philosophy (What is “good” to this character? What is “evil?”):
  She regularly attends a Catholic church. She has a fairly good knowledge of the Bible, and went to Notre  Dame, a Catholic school. She adheres to Catholic belief as strictly as she can.
  Habits:
  She regularly watches "Titanic" and "The Notebook," her two favorite movies ever. She watches them whenever she's bored or cooking something. Family Life:
  None. Single. Her only family left is her brother Michael. Her parents have been dead for years.
  Favorite music/movie/TV show:
  Titanic
  The Notebook