Which lines from "the raven" by edgar allan poe show that the speaker has lost hope of ever being able to move on and recover from the pain of losing lenore?

Well I suppose you could say it was just him going mad while speaking with the raven due to this line or stanza Then methought the air grew denser, perfumed from an unseen censer
Swung by Seraphim whose footfalls tinkled on the tufted floor.
"Wretch," I cried, "thy God hath lent thee - by these angels he hath sent thee
Respite - respite and nepenthe, from thy memories of Lenore:
Quaff, oh quaff this kind nepenthe and forget this lost Lenore!"
Quoth the Raven, "Nevermore