I feel Kikyou is aware she has no future with Inuyasha and she accepts that. Personally, I feel together they are incompatible anyway.

But if someone can fall out of love so easily, then it wasn't love in the first place.

In later episodes it reveals how she starts to let go of her past, and the same for Inuyasha. She is focused on destroying Naraku.
But, if Kikyou can't have a resurrected life, then why is it assumed that Inuyasha or Kagome will be able to be together and in what era.

Talk about upsetting the balance of nature!