The grass is always greener on the other side of the fence

　Sometimes I envy others for their good situations. Actually it is irony to image that the life of others is an ideal, because it is easy to see the life of others. Until now, I just looked at positive things and I didn't find out negative things, which are hided in the positive things, Now, I realize everyone has some problems, even if someone sees to really be happy. It means someone who appears better off than me, actually has different kinds of challenges. Here is an idiom, which express well this meaning. "The grass is always greener on the other side of the fence."
I think I need to trust and love myself, if I love myself I could be satisfied with my life, and maybe I don't need to envy the life of others.