Well its a cute poem, but it has a lot of mistakes...
"he is he entire life"
^^ he is her entire life..change he to her..the second he ;)

"the funny this about this is"
^^ the funny thing about this is
.........change the first this to thing..

"the teenage girl is...me "
^^ i think it'd have a more powerfull efect if you said "that teengage girl is...me."

just some suggestions...
Aly