The speaker is asking an ex, or someone they've been entangled with, to come over "just to talk." But the poem quickly suggests that talking isn't the whole story. They admit that the closure people sing about never really fixes anything, and they call the relationship a "bad cycle" that is hard on the mind and soul. Yet they can't bring themselves to call it bad for the body, because physically the two fit together so well.
The memories they choose are tender and intense at once: a hand pushing hair out of their face, a gentle grip, then hands around the neck and scratches down the back. Closeness and desire are tangled up together. The repeated "perfect fit" and "perfect love" show the speaker mixing up physical match with real love.
The mood is lonely, honest, and a little self-deceiving. The final line sounds calm, but after everything before it, "just to talk" feels like an excuse, and the speaker seems to know it.