That is where the effort comes in.
I can almost guarantee you can find a 18 or 21+ server for your interests. If not, I am sure there are servers dedicated to a similar age range that have channels you can chat in.
There are many people who have developed long term long distance relationships online. Keep in mind that building relationships takes time and effort. Anybody who is active on a server can be a long term friend.
Instant friendships are very hard to find. If you are lucky, you might stumble on one, but I would recommend not expecting that to be the norm.
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