Perhaps we will never no more than what is posible in our state of existence.
Death will come to us all and we shall see if something is after, if not we simply do not exist anymore. You won't have to worry about anything anymore so i feel this is not something to cause to much distress.
We may just be the extention of life on earth, a small piece of what has grown, we may be the first chance for life to get of earth and spread out to other planets, life....trying to survive, earth cannot support life forever.
You, me, we are all just units to a greater whole. Life tests its boundaries, the best options survive, and evolution happens.
I personally support evolution, the theory, we obviously cannot have concrete facts about everything. So you have to conclude some things from your own observations.
Life is a giant living unit, earth in itself is somewhat of a lifeform.
Each unit in a species arrives with strengths and weaknesses, the slight edge in a whole group will nudge out the slight weaknesses, and over time it evolves.
Look at people, we have different races, evolving to our specific regions, white people, out of the sun for a large amount of time being int eh north, less skin color, black people, evolved to need color, you can see these changes happening.
Proven designs, the cockroach, still here over great amounts of time.
Everything in a constant state of change. We are just a small drop in the bucket, enjoy it well it lasts!