Won't we get bored of the same people over and over again for eternity ? Why not have kids ?
I'll try my best to explain this. Because God is eternal He dwells outside of time. Meaning He is in the past, present, and future. That's hard to comprehend, only because we know nothing but the bonds of time. So outside of time is just this long "now". If that makes sense.
Now, I could be wrong about this, so if you disagree I won't mind. Bear with me. Have you ever been in a moment where you say to yourself "I wish this moment could last forever??" Ok I'd say take that joy, that feeling of love, excitement, passion, zeal, pleasure or whatever else you were feeling, multiple that feeling by infinity (because God is infinitely good and wise), and stick it outside of time into eternity. Now you have the greatest moment of your life on repeat. That "now" sustains you through eternity. Meaning all those great feelings you had just stay there. They won't pass tomorrow because you are in tomorrow. You can't look back and reminisce about it because it doesn't pass! You may ask what will I be doing? Does it really matter? I remember in my teenage years laying with my girlfriend doing absolutely NOTHING and I wanting that moment to last forever! Just her presence alone made me feel that way! In heaven I'll have the presence of one who is infinitely greater and that presence alone will keep me infinitely happy.
Some preachers say we will also spend eternity chasing the infinite wisdom and knowledge of God. I forget where the biggest library in the world is, but a man can spend all of his days reading in that library and he won't get close to finishing it. Scientist could spend all of there days studying science books and they won't even scratch the surface of true knowledge. And that's just earthly knowledge. Thousands of years and we haven't even scratched the surface! You can spend eternity exploring knowledge you can touch and see. But wait there's more! Add to that the spiritual knowledge that we can't see or touch! If space is basically limitless and it's physical, there's no limits to what's in the spiritual realm! Things the eyes haven't seen and ears haven't heard! God is so vast that eternity in His presence will be never ending.
Seriously, Kids and marriage is great, but it will have nothing on what's waiting for you. You will not miss it. You will be like a kid who thinks his toy stick is the best toy ever, until his father brings him legos, hot wheels, and remote control cars etc lol He then will understand that though his stick was good, there was something much better that made that stick seem small in comparison.
Now, I hope I've broadened your perspective a little bit. I'm trying to get you to see how grand and glorious God is. Yet my ignorance will never do Him justice. There's not enough words. When Moses asked God what name he should give the children of Israel, God said I Am that I Am. Why? Because there was no name, no thing, no words that God could actually and truly compare Himself to. He's like nothing we know. Trust that He has something greater for you and look forward to that day.