Companionable
Part of speech: adjective
Definition: Having the characteristics of a worthy companion; friendly and sociable.
Sociable
Part of speech: adjective
Definition: Tending to socialize or be social; friendly; inviting; congenial.
Example sentence: It's time to commit to finding the answer, to search for life beyond Earth. Mankind has a deep need to explore, to learn, to know. We also happen to be sociable creatures. It is important for us to know if we are alone in the dark.