All I have is a Dream..

Jealousy is funny word. We use it to describe possessiveness. We use to explain envious feelings. We get scared when our loved one start expressing it lot. We get scared when we feel it ourselves.
Its supposed to be one emotion yet it generates so many feelings around. It generates anger, helplessness, love, hate, and even nervousness.
As humans we like to be owners. Even when it comes to relationships – even non-existents. We always want to feel secure. No matter how people try to prove that to us, A simple gesture or sentence can brings out worst kind of insecurities. And we know it leaves us vulnerable. Yet, we cannot control it or maybe we just don’t try hard enough.
So, is it really ever okay to feel this way?
So, is it okay that I do feel happy for certain people but cannot really rejoice in it? Is it fine that I want to look like that? Is it okay to wish for my own Happy Ending than rejoicing in others? Is it fine that I hate the fact my life’s not taking directions that I want it to, but others is? Can I really wish for other’s share of luck?
Or Am I just being plain selfish?