This poem is really pretty. I mean that in the sense that the words and the rhymes that were used all sounded really pretty. The meaning of a lot of them, however, is quite lost on me. 

There is a man who has lost his lover, he misses her, and seems to have thought up a raven to deal with his grief. The overall thought of the poem is clear. 
Unfortunately, there are a lot of references to myths or other intellectual stuff that I am unable to follow. This took me out of the story/poem too often for me to feel fully emerged into the emotion of it all. And so, no matter how pretty it all sounded, and no matter how awesome this poem must be for someone who did get all of these references, my enjoyment level was rather low and I didn’t like it that much. 

Maybe I’ll give this poem another shot some other time. Then again, maybe I won't.