The speaker is looking back at a relationship that hurt them, and refuses to pretend otherwise. The opening lines are blunt: "I will never forget what you did. Nothing of it." There is no softening here, no attempt to move on or let the pain fade. The hurt stays whole.
But the speaker doesn't only hold on to the pain. They also promise to remember "all what we did. Everything of it," which suggests the good times matter just as much as the bad. The repeated structure, a promise followed by a short, firm correction, gives the poem a steady, stubborn rhythm, like someone insisting on their own memory.
The last two lines turn inward. The speaker says they will believe in what they do, "even in the fact that I still love you." It reads as both a confession and a decision. The mood is quiet and honest, a little sad, but not weak. The speaker admits the love isn't gone, and chooses not to be ashamed of it.