Jonson's "Song: To Celia" is a love poem. The speaker is declaring his love to Celia and asking her to give him any sign that she might return his love. He is wooing her through his verses.
In the first stanza, the speaker is begging his beloved to leave him a token of her esteem. All she has to do is show some love with her eyes ("Drink to me only with thine eyes"), and he will return the gesture. Or she could kiss the rim of a wine glass instead of him, and that will be enough. He says he is so full of love and longing for Celia that he would prefer her kiss, even through her lips on a wine goblet, to a sip of even Jove's, the king of the gods', nectar.
In the second stanza, the speaker reveals that so far his love is unrequited or unreturned by Celia. He says he sent her a wreath as a token of his love, and she sent it back, rejecting him. Nevertheless, he is still not displeased, because she breathed on the wreath, and now it grows and carries, he swears, the scent of her and not itself.
The speaker shows himself to be lovesick and yearning for any response at all from Celia. He uses hyperbole or exaggeration to express his love: she means more to him than the gods do, and he imagines her fragrance invigorating the wreath she returned, and he hopes it will not "wither."