This is one of the most pressing questions that humanity can ask. The answer can lead us to drastically change the way we live.
I believe you are an eternal spiritual being. Even though you took your first breath here on earth; I believe you were meant to exist forever. God put an eternal spirit into each one of us and this spirit is what makes us unique. I also believe there are only two eternal destinations for the human spirit, heaven and hell. Hell exists because God will not force us to love Him because love cannot be forced. He also will not override your will. You were created with the ability to choose your path and God honors the way He made you even if the choices we make break His heart.
So many times, we strain for the wrong things in life. We think we are alive, but we are simply existing. We think we are holding onto life, but God sees us as holding onto our death.
You see, it isn't when you die that you find out if you will live forever or not, but if you are truly alive when you die, then life will overcome death. That is why it is important to choose life now, and that only comes from choosing Jesus.