I'm late 20s/early 30s. Since ~2011 the only social media I used was Reddit. No Facebook, Twitter, etc, etc.

What you're saying is exactly how I met my now wife. I looked after myself, did shit I enjoyed, found community events, hobbies groups, lived life, met lots of people, made new friends. Eventually I asked one of the friends on a date and now my best friend is my wife and I can't be happier.

I will say, not having Facebook was a problem in some areas though. I missed out on group activities, group hobby chats, that sort of thing but I didn't care. Friends would invite me to some of them anyway. Also, It might have changed these days but a handfull of people refused to trade numbers, they wanted me to add them on Facebook which was impossible. I didn't let that get in the way either but it was kind of 'hard' to miss out on a potential friendship. It all worked out in the end for me.