For the lines
<em>Pale grew thy chee</em><em>k</em><em> and and </em><em>c</em><em>old, </em>
<em>C</em><em>older thy </em><em>k</em><em>iss....</em>
alliteration have been used. The technique is used for the letter sounds of <em>k</em> and <em>c</em>.
For the lines
<em>The dew of the morning </em>
<em>Sunk chill on my brow— </em>
<em>It felt like the warning
</em>
<em>Of what I feel now.</em>
there is a regular rhyme scheme for the words brow-now and morning-warning. Additionally, the author applies foreshadowing to the lines.
The lines <em>A shudder comes o'er me— </em>indicates a metaphor how the main character feels towards his love.
Overall, the the lines focus on the language of sensory description of a physical intimacy.