This was a really powerful poem that I think successfully captures the pain and anguish of unrequited feelings and seeing the object of one's affection in a new relationship. I thought the line "I am not a loss for you" was particularly poignant and you did a great job of creating a bond with your reader.

I think the last line ("I hope I die before I'm nothing to you") read as a bit melodramatic. Up until this point, the poem felt like it was logically progressing through some tough but rational emotions, and then the last line cranked the emotion in the poem up to an eleven and felt like it was really going to extremes. I think a more understated ending would help balance the poem out a little.

Overall, I thought this was a great poem. Nice work!