Go back a long way

Pro Tip 1/3

Indicates a close and possibly nostalgic relationship between people.

Seeing you again after all these years reminds me that we go back a long way, my old friend.

Pro Tip 2/3

Use it when referring to a relationship where individuals have shared past experiences.

My mentor and I go back a long way; he's known me since my first day on the job.

Pro Tip 3/3

Implies a history of common experiences or events that connect people.

We go back a long way, to the times we fought side by side on the field.