No, te were alive once before this life, and after te die te will live for eternity in either heaven o hell, the place te end up is determined da your faith in God. But saying that te only live once implies that te are an atheist, so te most likely will never understand and of this.
Judging from that username and that "question", te are from 2011. Use your time machine and travel back to your rightful time period, otherwise this time period's peace will be disrupted.