Remember me when I am gone away,
Gone far away into the silent land;
When you can no more hold me by the hand,
Nor I half turn to go yet turning stay.
Remember me when no more, day by day,
You tell me of our future that you planned:
Only remember me; you understand
It will be late to counsel then or pray.
Yet if you should forget me for a while
 And afterwards remember, do not grieve:
The narrator ends the first eight lines, the octet, by telling her love to do no more than remember her. 
 Note that Rossetti’s poem ‘Song’ (‘When I am dead, my dearest’), also focuses on a natural mourning period, with no elaborate gestures. 
 The semi-colon separates ‘me’ and ‘you’, symbolising the distance between the dead and the living. This  caesura  also separates her emotional plea for him to “remember” her, and her more logical explanation of what he should “understand”, mirroring her conflicting passionate and clinical approaches to death and separation throughout poem. 
 ‘Only’ is an important word, adding to the comforting tone of the poem. Rossetti is asking her lover to forget the pain and “only” remember the positive memories they have with her. But depending on how one interprets it, it could also suggest a note of desperation and pleading.
Remember