Your purpose of life or purpose of living shouldn't be about yourself. It should be about something that isn't ego filled, such as the betterment of humanity or people helping people, or protection of the human species. If you create a purpose of living that isn't of those above, then you are creating a self-serving, egotistical purpose of life, which only serves to damage others.
Your individual actions will speak volumes about your own individual character. It will show people how much you understand your life. When your actions speak louder than your voice and the two don't match, then you are showing people that you cannot be respected, trusted or loved.
You will accumulate no friends, you will have disrespect from family and you will walk through your life with a negative view. Not to mention, you will continue to ask yourself, why me? Why is my life so lousy? Why doesn't anything ever go right? And, never find the answers.
Please understand that I've spent much of my early life filled with ego and then came to the self realization that I was damaging the people I had around me and those who I interacted with. Thus, I was ruining my life.
Once I came to that self realization it was a lesson in humility and a very hurtful one at that. However, I have learned to overcome and understand what is necessary to prevent it from happening again. It takes true awareness and recognizing that life isn't solely about self. Setting your own purpose as I've outlined here will help you, so you can overcome the same hurdle I did.
Thank you for your time.