Do not confuse history with compatibility.

Shared time creates something valuable and it does not create fit. You can know someone for twenty years, have a great deal of affection and memory in common, and still want entirely different things from your life now. History explains why you are connected. It does not answer whether the connection still works.

When weighing a long relationship, ask whether you would choose it if you met today. That is not a decision rule, just a way of separating the past from the present. Long history deserves care in how you handle it, and it does not settle the question.