Four short lines, and almost all of the feeling sits in the last one. The speaker opens with a simple confession: "I miss you." Then comes the quick "trust me I do," which sounds a little like someone who worries they won't be believed. That small reassurance hints at some distance or doubt between the two people, though the poem never says what caused it.
The real turn comes in "I just hope / you'll miss me too." The word "just" makes the wish sound modest, almost casual, but it also reveals how unsure the speaker is. They are certain of their own feelings and uncertain about the other person's. That gap is where the vulnerability lives.
The rhyme of "do" and "too" gives the poem a light, almost singsong feel, which sits oddly against the ache underneath. The mood is quiet, tender, and a bit anxious: someone trying to sound relaxed while hoping very much to be missed back.