Good poem i really like it but i think you need to change the ending as you suggest

hmm...i don't have anything in my mind for now but why not use sentence ending with strife for the last line?

OKay, first I would break it up into 4 stanzes at least to edit it, then I would check my word useage(like line 11 you meant to use "off" not "of") or even just "you've got to wipe your tears"
Last stanza change to:
Things change
So that is the mystery
If I am your girl
Then we must make history

Give it some thought.

Short and sweet and to the point ,I give it a 5