Of course you shouldn't believe anything you read on social media..What was said in the blog or what was shown on the video, well, are not all necessarily true. The problem arises when instead of being happy for the success or happiness [or people having the time of their lives], makes one jealous, says more about ourselves... Examine your heart, why do we feel that way? Why can’t we be happy for the achievements and success of others?
If you see a friend travelling too much, or posting how great his/her relationship with his spouse or family, or how she/he lost a lot of weight, or what restaurants he/she have tried, or the other material stuff that he/she has recently acquired; instead of feeling jealous or envious or comparing your life with others, why not turn that jealousy into something productive and positive. How? By working hard and putting your heart in everything you do and you'll be amazed of the after effects.