Translation

• (idiom) to be on very good terms with each other
• to hit it off with sb
• to be passionately in love with each other
• to carry on intimately with
• (of trading, conflict etc) to be in full swing

Synonyms

• 依依不舍, 依恋, 情景交融, 缠绵, 缱绻, 难分难解, 难舍难分, 难解难分