The speaker in the poem is in despair.
When she likens herself to a cowslip, she creates the impact of the way she feels from within, the sensation of disappointment and nearly giving up. Due to her state of affairs of giving love and now no longer getting it back, the speaker feels dejected an sad due to her state of affairs. The simile serves as proof to the terrible emotions that the speaker has due to her situation. The simile is a factor of connection with any reader who desires to recognize what the actual emotions of the speaker are, and a point of understanding about how she feels from within. The simile additionally creates additional comprehension of the speaker's tone.
#SPJ4