go your own/separate way idiom
各走各路，分道扬镳
When people or groups of people choose to go their own way, they decide to live or work without continuing their previous personal or business relationship.
After a couple of years together, we realized we weren't really happy and decided to go our separate ways. 在一起两年后，我们意识到彼此不适合对方，决定各走各的路。