friendsome
Indicating or characterised by friendship; in manner, like or befitting a friend; friendlike; friendly.
Everyone outside my mother called father Eben. Father looked up and smiled. He and Miss Bet had been terrible friendsome ever since the day when, as a tiddleliwinkie snip o' a child [...]
Where it comes from
From Middle English frendsome, equivalent to friend + -some (adjective). Compare Scots friendsome (“friendly”), Dutch vriendzaam (“friendly”), German freundsam (“friendly”).
Adapted from the Wiktionary entry friendsome (CC BY-SA 4.0).