I have the scientific answers generally agreed upon by the scientific community to the 2 bolded sentences.
our purpose is to live until adulthood strong and healthy. pick a mate/mates that are also strong and healthy to make kids that are strong and healthy and raise our kids so they can have kids themselves to keep both our race going strong and our own gene pool going. it is hardwired into our brains to seek this out. the reason it is hardwired in is because not only does it allow us to live for ever, in a sense, but it also makes our lives easier by having extra hands around to do the foraging/hunting/farming/fishing.
our parents created us for the above statement. their parents created them, and their parents created them, all the way back to either our planet being seeded for life by something/the first micro-organism to be produced from the primordial sludge which was present on our early earth/ some other scenario that I don't feel like researching right yet.
just speaking from the vastness of the universe in general it is a statistical certainty that their is at least one other place that harbored/is harboring life regardless of size/ intelligence
Since man has begun searching the stars in our own Milky Way Galaxy, we have detected over two dozen exoplanets (planets orbiting a star not our own) in the "habitable zone" or the area around the host star that could support liquid water on the surface. That is with the Kepler space telescope focused on just one area of our galaxy and not "looking around" different directions. Think about that: over two dozen possible planets to support life. Our own little Milky Way Galaxy is home to over 100~400 billion
stars and an estimated 100 billion planets or quite possibly a great magnitude more. Our next closest galaxy is Andromeda. Andromeda is approximately 20% larger than the Milky Way.
To give you a sense of scale, the Earth is 93 million miles from the sun. The New Horizons probe from NASA was launched on 09/24/2005 on it's way to Pluto. New Horizons made it's closest approach to Pluto on 07/14/2015, nearly
ten full years later. New Horizons traveled at an average speed of 36,373mph. That incredible speed....for ten years....to reach the furthest (dwarf) planet we know of in our little solar system.
Studying the effects of gravity in the Kuiper Belt (the area at the farthest reaches of our solar system), scientists believe that there is at least one as-yet undiscovered ice giant planet past Pluto.
I guess I'm saying that the universe is an impossibly huge place. I hope I'm still alive when we make contact with beings from another planet.