It's about timing. What you need to do is tail your crush every hour of every day until there's another terrorist attack. This way you and your crush can take cover in a secluded underground shelter (which you will have scoped out ahead of time) and as you develop makeshift technology, dig into the soil under the concrete for food and water, and procreate so that the future generations of man might rise from the darkness, your crush will watch you over the years and start to think, "What was I doing dating all those losers? None of them would ever have thought to distill our urine into an antibacterial ointment."

And that's when you make your move!

Head on over to Girls are Pretty for some extraordinary reading material. It's little doses of prose and fun, one day at a time. Thanks to yotam for recommending this originally.