This is "Thiru Kural" about true friendship. it was written some 2000 years ago
" Muga naga nattpathu natpanru nenchatthu
aganaga nattpathu nattpu".
It means just seeing face and talking its not true friendship, but understanding the heart feelings is a true friendship.
With warm wish
Is There True Friendship?
The True friendship doesn't know what is distance. know that it's able to make everything to win that distance. When there's trouble in the way of a friendship the love has power enough.