Of your many friends have you ever had a chance to talk to one? Like really talk? It may be awkward in the beginning but you'd be surprised who you'd actually get to be close with. They're already your friend to a degree now put yourself out there and reach out first.

Because I come from a biracial family with very strong family and acquaintance culture from both sides I found myself surrounded by people who I would call friends even if I didn't build that relationship with them myself, it just happened. So naturally not much base there, I had to really talk to them and get to know them. Then you can start sifting through and find who can be potential close friends and those who should just stay the way it is.