I think Will's reaction is very appropriate. I think as well that you captured their voices. I have one critism, I wonder if it wouldn't be better in third person. This story is really about two sides, and though Will is the one suffering the betrayl, Elizabeth killed a man and you wrote her pain through her dailouge well, and Will expressed his, so I'm not sure first person is nessiary.
It's a good story nonetheless. I genuinly enjoyed this, and I'm glad you made Elizabeth responsible with out making her the bad guy.
Thank you for writing this!
Author's response
You know, I really hadn't thought about putting it in a different POV. Thanks for the suggestion. OH, and thanks for the review as well. Very kind of you!