reflection on my purpose in this world

I am an optimist,most of the time.But everyone and everything has limits.Recently,I was doing some paper work for ending my internship, it got on my nerves (yep the paperwork got on my nerves). 
Reviewing everything i have done,worked my hardest , pushed myself over the edge sometimes and knowing in front of my bosses it will not be enough makes me see myself critically, which is bad. self doubt is always dangerous, avoid it . 
     so my critical self saw me average at my job.The work that i finally can claim to do after 5 long years, is average.It follows a realization may be this isn't my calling.This is not what i am suppose to do.I am an adult,started my professional journey and still don't know who i am,or whats my purpose in this world;other being a background colour,which is noticed only when its gone; a third wheel who stays in shadows.
     For some reason it didn't sound strange, shadows are my comfort zone.I stay there,I like it there.Great thing about background colours , nothing is complete without them.I like to be there for people when they feel down and at there lowest.I like to push them up. I am not at the top & it hurts me sometimes. but rest of the times i know i can help people when they are in the dark pit , i like my role of a ladder who pull people out of the dark pit back into light. 
i hope it doesn't sound like bragging, ranting or some thing bad. because i like to help people that way when they smile with hope . when their eyes gleam with the will to fight and get to there destination & they achieve that position. That's when i feel at the top of the world, and all of the self doubt just vanishes away because yea i am bad at a lot of things & average at others i do things differently mostly wrongly too . but at least there is one thing i am good at & i get paid in best way possible : a precious human smiled because of me.
   to conclude : your calling shouldn't have to be your passion , your work or your major .It doesn't have to be some thing major , something too obvious that everybody can see it. it is definitely not measured by money; it definitely will be something that makes you content inside,it will give you a sense of accomplishment , you don't look at your watch while doing it . you are willing to give it your time. & it can be as  little as making some  one smile.