I think that the title moves this poem into a specific area, because either the speaker will never be like the person he/she is refering to as in that person is way too good, or that person is something the speaker does not want to become, which somehow gives the poem itself away. I think that finding a fitting title is the toughest about the whole poem, so you might want to think about finding another one.

The poem itself is filled with convincing emotions, but it somehow lacks that certain something, that makes the reader want to read this poem over and over again. I'd just recommend you to add a few more verses and then it'd probably be better.

You should never change for anyone, keep that in mind.