There are people who come into your life and never leave. You may never see them again, you might not even know their name. Or maybe you know their name, and their secrets, and their story, but you might not always be with them, or be able to see them again.
They might go away, or you might go away. But the people are still with you. The things they've said will remain; you'll still carry their voices. You'll have their smiles, and the remnant of a hug. These people do not leave.
They are still with you, and always will be.