Do feelings change?

I guess it is normal for us to feel different as we get older. But sometimes I wonder if that's only because we have more experience and wisdom or because we live in times where our technological advance is far ahead of our sociological and emotional advance. 

In the 90s when I went to school, there was basically no internet yet and if you wanted to meet your friend, you'd make plans in school or call them at home to make an appointment. 

You'd meet and play outside (who does that anymore?) or watch friends play games and take turns (a bit like those gaming channels online, but more realistic). 

And if two people wanted to get to know each other or date, you couldn't just swipe and match, you had to talk to the girl or find a way.

I always tried sending them love letters where I proclaimed my strong feelings for them and asked them to reply and make an appointment to watch a movie or something (somehow, going to the cinema was my idea of how dating usually went). 

Unfortunately, I never had any success. I must have written and sent 10-14 letters and only received a reply once (no luck of course). 

Even the girl I used to walk home with didn't respond and it was weird that she never mentioned it, even as we continued to walk home. I guess it was proactive ghosting, before ghosting was a thing? 

Nowadays, I would just ask that girl why she didn't respond or maybe even ask her out right away if I liked her. But unlike back in those days, I actually no longer feel excited or nervous at the prospect of dating or even being intimate with a girl. And that's kind of scary. Because it seems to indicate that having a partner is nothing romantic anymore, nothing magical. It's more like some task you can cross off your to-do list. And I really wonder why it's like that or if it's actually this way. 

Without some magic and irrational emotions, what's the point of dating, being together, being intimate? And it doesn't seem like I can't feel love, I do feel a lot for my cat! But unlike most women I met, he is sincere and doesn't pretend or play games.

If I had 10 or 20 cats already in my life, would I feel less for them too? Is it just that we get used to emotions and they lose all meaning? But then wouldn't we also lose all interest in eating, drinking, other repetitive things?!

The way it is now, people only seem willing to connect on a very superficial level, unwilling to share much. So maybe I am just tired of those superficial relationships that seem about sex mostly. Or maybe women are just not used to doing ANYTHING on their own, without being explained why they actually should? 

What are your thoughts?