I don't try to make friends, so I don't really have any legit advice. I like being alone, it's relaxing and my comfort zone, and I think many people feel the same. I'd rather spend a Saturday evening chilling in my room, jamming with my instruments, than being around a group of different personalities and trying to keep the conversation going. This can be really difficult sometimes, at least for me, I'm sometimes a very quiet person, but I can be the life of a party, too, depending on my mood. So compatible personality is a big deal for me.
But I do have enough/plenty of friends that I get along with and we sometimes hangout. Most of my friends are into gaming, music, movies, reading books, skateboarding, riding bikes, hiking, lifting weights, etc. Pretty normal stuff. I'd say our intellectual curiosities and hobbies bring us together, which is great. Most of my friends I met at school or family gatherings, but I've met a few good/cool people though other friends, but most of those end up becoming social media acquaintances. It's rare for me to meet someone at a party or concert or even the skate park and suddenly we're exchanging contact information and hanging out every weekend. Very rare, but I'm glad to have a few.