There does not necessarily have to be a meaning or purpose to one’s life. However, many of us desire to have meaning, because many of us are afraid of the void; of being nothing, of living nothing, of feeling nothing. They are afraid of the eternal, of the existence of nothingness.
Many humans feel the desire to depend themselves over absolute purposefulness. This is why religions and other cultural constructs are created; to escape from the nothingness that fills the universe. This is why the meaning of life is questioned - to escape the possibility that we are nothing more than organisms and no further.
Absoluteness gives so much comfort, like that of a mother. To seek meaning is to seek to be embraced by an entity or concept of motherly importance. We can also believe that this motherly entity or concept is unquestionable and immortal, and thus the realization of the universality of nothingness is avoided.
But there is no eternal and gigantic absolute like that of the void. This is why many humans create and fall into other absolutes - to defeat the realization of the universal void. The truth is hard to be consumed by those who are not strong enough to face the silence of the eternal nothingness!
But the eternal nothingness is here, there and everywhere. We take cover under abstract prisons of ideas and social conventions and thus can ignore the nothingness even for an entire lifespan.
However, once nothingness is realized, nothing can oppose you. The void can give you a great stoic and serene power that can overcome any desire and suffering. To be one with the void is to accept the absence of worth in this existence; that worth is nothing more than an abstract drug we take in order to avoid bothersome and potentially devastating extended sessions of philosophical contemplations.
Once you are one with the godless void, you become sober from the addiction that is meaning-seeking. You realize that meaning is merely a creation of the consciousness, not an objective and concrete entity. To be realistic is to understand this insight. Then, there shall be no unnecessary desire to torment you in the journey of life, that may or may not be pointless, depending on what perspective you may choose after embracing the void, the solitude, with open arms. You then become resilient from the dangers of nihilism and existential despair. You become stoic and independent, like a mentally healthy, sober and mature, individual.