NOUN (2)

1. a feeling of liking for another person; enjoyment in their company;

2. a friendly disposition;

The Collaborative International Dictionary of English v.0.48:

Friendliness \Friend"li*ness\, n.
   The condition or quality of being friendly. --Sir P. Sidney.
   [1913 Webster]

WordNet (r) 3.0 (2006):

friendliness
    n 1: a feeling of liking for another person; enjoyment in their
         company [ant: unfriendliness]
    2: a friendly disposition [ant: unfriendliness]