I have never been involved with Facebook and from all the negetives I have heard about it, I don't have any desire to get involved with it. I know of people who use it and they do not put out the difficult or bad things that happen to them, they only put up the positives so you are not getting the entire picture of people's lives.

It is normal "human behavior" to compare ourselves with others to a degree. But it is important that you don't do it to a point where you "lose yourself" or your sense of your own value, it just isn't healthy. We all are unique anyway, we all will have our own unique lives that no one else experiences. There is going to be ups and downs for everyone in life too. Do your best to learn and grow and be yourself and know you are unique. What may seem to make others "happy" may not make "you" happy so don't stress and think "you need to be what they are".

I would suggest you put that Facebook on ignore and do things for yourself, take courses, try things, learn and grow into yourself, be free of what others do and just be "you".