Wow.. I'm glad for the Feelers' perspective on this thread!
Me? I do get envious on occasion, just like I sometimes get angry or sad. Like any negative emotion, I accept it, let it pass, try to figure out what it signaled, and move to correct it.
In the case of envy, it might mean that I desire to acquire a skill that someone else has. I then let the emotion go, then I try to accept or resolve the situation. I'll ask the person for pointers, do research, practice, and so on. The emotion itself doesn't last for very long (less than a minute, tops), but it signaled yet another drive in me.
To me, emotions are just that.. signals. Just like physical pain is a signal. Some people might feel certain emotions strongly, some people not at all. Although, my ENFJ friend keeps telling me to stop suppressing emotions.. ones that I don't actually feel..