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I am left feeling upset and heartbroken but smiling and feeling all warm.
I think you could describe the forest as well at some point. It will really help add to the enviroment.
The last stanza was beautiful because it showed that he never forgot about her and he kept her alive. It just gave me one of those sad smiles.
I think you are doing a great job. There is just enough rhyming, description, feeling and narrative in this poem.
Keep practicing I know you're going to write some great poetry. (Not that this one isn't)