Why does melinda decide she doesn't want to hang out in her closet any longer?

Ineed advice. i have a lot of friends at school but recently my best friend for some reason didn’t like our friend group. she wanted to switch to a new table during lunch. she said she found a new table where we would be welcomed if i wanted to come. i agreed because i knew i would continue to talk to them outside of lunch. after a month or two, my best friend got mad at our new lunch table group. so she left for a day or two, but i stayed because i actually kinda liked it there, even if it was kinda crazy. then she came back to the table. eventually i started to miss my old friends at my old lunch table. so i went over there for one lunch. then after lunch i sat at my new lunch spot before the bell rang. they all called me a traitor. so now i sit with my old lunch group, which is fine because i missed them, but i also miss my new, now old, lunch table. what should i do? p. s. sorry if you loose your last brain cells trying to understand this.

What is the effect of the haiku structure on this poem?   how does the line structure describe the subject(s)?   and how does a haiku compare to a rhyming and longer poem in terms of its effect on you as a reader?

Which paired device and theme does the poet convey in these lines