Ms.Sue could you help me again please?Thanks

-Earlier you say:
The best example is the last four lines:

"And so, all the night-tide, I lie down by the side
Of my darling- my darling- my life and my bride,
In the sepulchre there by the sea,
In her tomb by the sounding sea. "

Many other lines attest to his love for her.

-Is the 4 line the best examples because he sleep/stay beside her tomb everyday or do you have another points of view? Thanks

I think you need to take all four lines together to get the message. Essentially Poe is saying that in his dreams he lives in her tomb with her.