Great poem. I really like the rhymes, they seem really natural.
One thing I think would really improve the poem is to fix the little grammar/punctuation things. Not necessarily periods and commas, but question marks and capital letters.

aww

My favorite lines are, "I know that you will never cause me pain/ and that means more to me than any 50 monsters slain" because it has such a nice idea behind it and the rhyme works so well. :) The last lines are also really nice for the same reasons.

I'm sure she'd really appreciate it.

well, the whole poem is cute, I like the starting and the things with hero.