friending

noun2

1. •
   (Internet) An act of adding a person as a friend on a social network.

   • Refreshments followed, coupled with teary farewells and exchanges of phone numbers and emails, and Facebook friendings. — 2015
2. •
   (no longer used) A sentiment of friendship

   • And what so poor a man as Hamlet is May do t'express his love and friending to you. — 1599