I guess it would be a letter of farewell. My mom gave me the ring, it's a celtic design with a norse ship

At any rate, it's a My Dying Bride song (My Hope, The Destroyer).
The lyrics (because the handwriting is smudged, terrible, etc) read:

Weeping with you. Arms around them.
Flowing with you. Without your men.
Keeping with you. Feeling their shiver.
Drowning with you. Deep in this river.
Tired and lonely. Sitting and staring.
Weak and filthy. No longer caring.
Wasting to nothing. The rubble of you
Hoping for something. Poison where love grew
People. Feel her mind
She is broken
People. Fill your eyes
Her body is broken
Leave me be, with my memories
I can still see all the lovers of me
I still know those feelings
You're still mine, my lover
I watch over you
Goodbye my lover
No sorrow. Please, no tears
Holy and fallen. Watch yourself die
Fade and wither. Long lost the fight
Tremble to sleep. Her man long gone
Years, and still weeps. Never forgotten....