Back in 2002-2009 I had a personal blog on #LiveJournal.
I found lots of new friends there. Half of them I met later in real life. I had even fallen in love once and had been left with a broken heart. :)
That was all way before the #Facebook "like& share" philosophy.
The dominating type of social media were forums and journals, and the main means of communication were comments. People would converse via comments, would discuss stuff, would get to know each other.