The speaker looks back on the love stories they have written and realizes that each one was only a prologue. Whatever hope or tenderness filled those stories, the ending was already waiting, and it was a sad one. The word "introductions" is the key: the happy beginnings were never the real story, just the setup for the heartbreak that followed.
What the speaker feels seems to be quiet resignation, maybe a little weariness. There is no shouting or self-pity here, just a flat, honest admission. The poem also leaves open whether the stories were about real relationships or invented ones, and that ambiguity makes it feel more personal. It may be a writer admitting that they can't help steering every romance toward sorrow.
The short, broken lines slow the poem down, so each phrase lands like a small sigh. The final word, "ending," sits alone and feels final. The mood is wistful, bittersweet, and a bit fatalistic, like someone who has stopped expecting a happy outcome.