How is love presented in Elizabeth Barrett Browning's Sonnet 29 'I think of thee'?

In Sonnet 29, Elizabeth Barrett Browning presents love as a force so strong that it borders on overwhelming. The speaker's love for her partner provokes thoughts of him that dominate the poem from its beginning to its end. The intensity of the speaker's emotion is firstly revealed in her initial exclamation 'I think of thee!' The monosyllables create a fast pace and the excitement this creates is mirrored by the exclamation mark. Barrett Browning uses an extended metaphor to compare her thoughts about her lover to 'wild vines'. The natural imagery legitimises her emotions yet also reinforces the presentation of love as exceedingly powerful, as nature can be, and even harmful to humans. However, Barrett Browning does not seem to be hurt, but encouraged by this intensity as the speaker becomes more confident and demanding as the poem progresses. The speaker's use of imperatives such as 'renew' and 'rustle' dictate her lover's actions and therefore, though love can be overwhelming, it is not Barrett Browning but her lover who is being controlled by these powerful emotions.