Sarah today is a much different girl then Sarah 5 years ago. I'm much more secure in myself. I'm not really afraid to share my opinion, or disagree if I think something is wrong. Not in an "in your face" sort of way, but I don't just nod and smile anymore. I'd love to be able to say that my insecurities about being rejected are gone. Obviously this situation proves that I still have those insecure feelings inkling somewhere inside.
As for the relationship, not sure where to go from here. It's always really sad when good relationships go bad, especially when you can't quite put your finger on why. I am, however, genuinely happy for them.