"Emotionally Engaged" by Allison Moir-Smith. It's amazing!
With all the WEDDING planning, there's a lot of emotional stuff to go through on your transition from girlfriend to wife. It's helped me tremenously already and made me realize the rollercoaster of emotions I'm on (elated to sad and depressed to excited to sad) is totally normal. She explains why they're occuring as well as how to work through them.