Aww. It's sad to see this end, but I'm happy that it played out the way it did. Knowing that Ember was so selfless during the wedding made her character seem that much more likeable.
Alex getting mildly cold feet? I think that's natural for any person getting married, but I'm curious to find out whether or not he actually acts upon his nervousness.
I know it's going to sound strange, but I'm really glad that Ember decided to take off. As strongly as Alex feels, asking Ember to marry him after just a few days of knowing her was a really irrational decision. Ember's choice to stay away and not interfere with the wedding made the most sense in her situation.
On another note, with Alex feeling conflicted/rejected, I'm curious to find out what he's going to do when he gets back to Baltimore.