definitely an ambivalent thing, about realizing the necessity of moving on and perhaps even getting there but with a clear sense of bitterness and permanent loss, if only a loss of some beautiful illusions, still lingering. the way the final line is said as a question shows that pretty clearly. just the perfect closer for an album like this imo, the "uplifting"/desperate climax of the last one and half minutes or so goes rather fucking hard.
The way he signs out of this song, "Everything's gonna... be alright?" It's as if he realizes in the moment he's saying it that everything indeed is going to be alright. He's slept with La Rossa, and he realizes the the feelings he had for Alice were malleable. He didn't need her, and he doesn't anymore. He may still be sad at his lack of someone to love since La Rossa seems to leave him, but he now knows that it's not missing Alice that's got him down. It's missing someone to love.
Just noticed TheMusicalVito's comment about this being an uplifting song. Sorry I don't see that. Alice has gone and he's slept with La Rossa; maybe not in that order. In love at last, but maybe only with a moment of perfect passion. Happy because he feels like he's raised from the dead, but that won't last. Everything that really matters to him is lost, but he's blind to that until the elation wears off. He's free at last, even though he doesn't really want to be. He's lost La Rossa as a friend, because she has no further use for him, and he's lost his girlfriend. Only later will he realise that all that's left is a lifetime of remorse.