I just glanced through my address book.
In the 3D world (in case your mother doesn’t consider online friends to be true friends), I can count 4 very close friends with whom I connected in my 30s.
One, I met through a community group. Two, I met through a professional association. The third, I met when she married my high-school boyfriend (with whom I’d stayed in touch).
At least one other professional-association pal is close enough that we invite each other to parties and other celebrations.
I can count another 5 or 6 from my 30s and 40s with whom I’m not in super-close contact these days – but with one exception (someone I decided, after much deliberation, to limit contact with), I could call on them for support in a crisis, and vice versa.
Then there are another dozen or so neighbours (all people I met no earlier than my late 40s, when I moved into this complex) and co-workers (all of whom I met in my 50s) with whom I hang out casually now and then – we have lunch/brunch/drinks/dinner, play Scrabble, go swimming, see the occasional film, and the like.
At least half of these people have the potential to be even closer friends if I put some effort into building the relationship beyond where it now sits.
And just to bring things full circle, I do count a number of people I’ve met online (both here and in other online communities) as friends. Not just acquaintances, but people I’d invite to stay in my home if they visited my area – and that’s not an invitation I extend lightly – and who have invited me to do likewise when I travel.
So, as Abs suggested, I’d recommend looking for like-minded folk in groups or classes that focus on your interests and passions. From knitting circles to political activism, there’s plenty to choose from. One of our local supermarkets throws free cooking classes. I’ve also met potential new friends while volunteering and dancing.
Oh, and one more source of people who can grow into treasured friends: nearly a third of my Facebook contacts are the now-adult children of some of my oldest friends. I served as “Cool Honorary Auntie” to these kids when they were younger, and they still allow me to be privy to stuff they might not tell their parents.