The only things I would change are the use of ‘joy’ twice in the poem; twice isn’t enough to really give the feeling of reference-type intentional repetition throughout a poem, but it is used twice, which makes it feel repetetive.
Other than that though, this is a very good, straight-forward love song that feels like it could be either new or very traditional.
It has a very Irish feel, as well, like a Seamus Heaney, W. B. Yeats love song.