It is nothing more than a pleasure and the heavenly happiness when you meet an old friend. The world has word for each and every feeling but there is not word for this. here is the best quote that explains it all. A dosti quote about meeting an old friend.
There’s not a word yet for old friends who’ve just met.
– Jim Henson
पुराने बिछड़े दोस्तों के मिलने को अभी कोई शब्द नहीं – जिम हेंसन