There is no room for jealousy in this life. The path your are on is for you and only you. Though others paths may seem greener, your own path seems that way to others as well.
Your progress, no matter how fast or slow it may feel, is exactly what you need to succeed. Focus not on what others have. Instead, understand the greatness within your life and let that feeling motivate and guide you to accomplish anything and everything.
Its all about perspective.