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INTERMEDIATE LEVEL
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close friend ☊ 
bạn tri âm ☊
close friend ☊ khách tri âm ☊
close friend ☊ kim lan ☊
→ → →
like: close friend → →
We're the best of friends (= very close friends). ☊ best ☊
Jo is a very close friend. ☊ close ☊
I know him fairly well, but I wouldn't say we were really close friends. ☊ fairly ☊
form sth: I formed many close friendships at college. ☊ form ☊
learn of/about sth: I learnt of her arrival from a close friend. ☊ learn ☊
male bonding (= the act of forming close friendships between men) ☊ male ☊
He liked her well enough (= to a reasonable degree) but he wasn't going to make a close friend of her. ☊ well ☊