Well, wait 'til you live together, find out his ear hairs are longer than his nostril ones, no longer need a morning alarm because his thunderclap farts wake you, have kids, school runs, homework, puberty, jobs that grind you down, cancer diagnoses, shit happening... life. Because life, blessed gift that it is, does have a way of setting some traps along its otherwise glorious path. And sometimes, sex takes a backseat. When it does, if you're a loving couple with a strong bond, you'll get through those times when sex is placed on the backburner. OP, you won't always be having sex 2-4 times a day, I'm afraid.
Shag each other 'til you've got muscles on your muscles and enjoy! It doesn't last forever, but while the amount you have sex will recede over time, the bond that fuses your love is an amazing lifebuoy that carries you through all sorts. You can still have great sex, OP... just less of it. DH and I finally got rid of our ancient rug that's seen years of kids, dogs, and cats ruining it. We used to shag each other silly on that rug, once upon a time. But the kids, the cats, the dog, the passing years, the ups, the down, the in-betweens all exist because we used to shag 2-4 times a day.... long ago! 