It is impossible to answer question "What is purpose of life?". It is impossible to answer it because you can't even define what is life.

In the end, do you really want to know what is the purpose of life? When you reach purpose of life, when then? What will push you forward? What will the point of anything when you reach it? Maybe purpose of life is seeking that something, challenging yourself all the time. Maybe this and that, only thing I know that without loving each other nothing got purpose to me. When I say loving, I mean infinite love and not 'I love you if...' That is not true love because true love got no conditions.

Went to see your blog and saw your intro post. If I may ask you, do you know deep in side of you what caused you to have PTSD, depression, anxiety, panic attacks, extreme tiredness and sleep disorder?...Could it be that you were trying to find purpose, but didn't at the time and that manifested like some disease? In my opinion literally everything is projection of our thoughts. Of course subconsciousness thoughts. I could expand more about this, but I think you will get what I'm talking about.