Stop comparing yourself to others.  On the surface it may look like they have more than you, or are more successful than you.  However, you don’t know where they started, or how they got where they are.  Life is not a race; it doesn’t matter if someone gets ‘there’ (where ever ‘there’ is) before you do, or with more stuff than you have.  For all you know, while you are  being envious of them, they are finding something to be envious about you.  Celebrate where you are and live your own life.  There is no comparison.