http://i3.kym-cdn.com/photos/images/newsfeed/000/466/043/7f4.png (Unsupported image host)
The only option I see in this situation is to force yourself to move along.
Things like this always happen and may or may not happen again in the future. Let's not forget, not all relationships run smooth.
You're feeling pretty bad now, but sooner or later you'll find some other special person that'll replace the bad feels with better ones.
Just chin up, and move along.