You are not wasting your time. As all poets we tend to be a bit wordy ( I think its because we love language so much, the spoken word is so exhilerating).
The first line is beguiling...it invites the reader into your poem and the invite is a little creepy, lol. You had a good hold on me until I get to the line "Can you lie down beside me and make me forget", that's when the poem changes and its not about the tomb or death its about the relationship.
And the character is angry and you feel the anger. The last line I found confusing as well. Clean it up a bit and rework some of the imagery. This could be a really spooky poem. Keep writing, poetry takes a good amount of work but well worth it in the end.

Thank you, I will consider your advice. I am grateful for your comments and for taking the time to write to me. Cheers