If we truly are alone, we’ll have to survive many millions of more years after we perfect warp drive to be sure. The universe is a BIIIIG place!
We don’t need no steeenking warp drive. Just think about it, gravity is instantenous. Gravity holds the solar system and galaxies together. We just need a grav drive. Instant “warp” travel.
We’re just tiny little specks about the size of Mickey Rooney.