I'm probably from a similar culture and friendship here means a very close personal relationship similar to, or in some cases even stronger than, familial relationships. I feel that the original post's concept of friendship is very shallow compared to that. Friendship in my culture transcends such categorization.
I didn't see the original three asterisks, so I'm not sure. In general writing, three asterisks is used as a visual break between two sections in a document.
I assume the other commenter is referring to using "(((@name)))" on Twitter, and similar patterns, which is some social media thing I don't understand. See https://en.wikipedia.org/wiki/Triple_parentheses.