to have a friendly relationship with someone
誰かと友好的な関係を持つ (dareka to yūkō-teki na kankei o motsu)
"They really get along with each other and are always laughing."
"彼らはお互いによくやっていて、いつも笑っています。" (Karera wa otagai ni yoku yatte ite, itsumo waratteimasu.)
to gain someone's confidence through actions
to stop a problem before it gets worse
to reveal one’s real character or intentions
to start fresh with a new mindset
to be exceptionally good at one’s work
to go with someone to say goodbye when they leave