Collocations for friendly - adj.

appear, be, look, seem, sound
become

extremely, fairly, very, etc.
exceptionally, genuinely
Frank was a genuinely friendly guy.

perfectly
He seemed detached, but perfectly friendly.

overly, too
He was starting to get too friendly (= in a sexual way).

almost
For once he seemed almost friendly.

not exactly, not particularly
Her manner was not exactly friendly

naturally

to, towards/toward
He was always friendly towards/toward me.

be, seem
become, get
remain

extremely, fairly, very, etc.
They were pretty friendly when they worked together.

with
She's very friendly with Maureen.

be on friendly terms (with sb)
We have managed to remain on friendly terms.

be

environmentally
environmentally friendly cleaning products

Friendly is used with these nouns:
atmosphere, attitude, banter, chat, competition, confines, conversation, country, disposition, dog, embrace, environment, face, fashion, fire, fixture, folk, force, gesture, greeting, grin, guy, hand, hotel, hug, kiss, letter, manner, match, neighbour, neighbourhood, overture, pat, pub, rapport, reception, relation, relationship, reminder, rival, rivalry, service, settlement, shove, slap, smile, territory, tone, troops, voice, waiter, waitress, warning, wave, way, welcome, word