Sometimes both don't realize it at the same time. Hopefully he will in time. Well done

This is a short and sweet message. Really striking yet simple. I thought the last two lines ended a bit abrupt but re-reading it now, I can see how it works.

Very good poetics. If I may make a suggestion though...drop that last stanza. The line about leaving the phone on sounds awkward, as we all know the phone is always on. By dropping it, the next last stanza, in fact the whole poem reinforces the title. Otherwise, worthy capture of emotion, longing, and tension in its uncertainty.