PLEASE help me! This problem with my friend is EATING ME ALIVE!?

Hun....I don't want to come off sounding accusatory here, so please take this as a concerned question. Are you sure you are jealous of her and not interested in her? As in in a love-interest way? It sure does sound, from an outsider's perspective, that you may really like - like her, but it is coming off as jealousy like it does for a lot of people when they are really interested in someone. Definitely do some deep questioning of your psychology on this, and perhaps your uality too needs a little redefining. If it ends up not being attraction, okay then, it's plain jealousy and you'll probably have a bit more knowledge as to exactly why you are jealous, and perhaps you'll have a better sense as to how to overcome that jealousy, perhaps by finding something that you are better at than her.