People fall in love. People hurt in love. People fall out of love.
Let me quote Dean first, "You know when a song comes on and you just gotta dance?" Dean was this, exactly like this. A hopeless romantic living his life the way it comes. And everything is great that way Dean, some of us have been there. Just that, we live in and out of this mode and a little less being a total narcissist.
Cindy, oh darling! You're the most 25ish version every human can relate to. "How do you trust your feelings when they can just disappear like that?" Your question haunts me every time I think about falling in love. You loved the idea of perfection a little too much, didn't you?
You two make a perfect tragedy you know, a portion of love, little remorse, many mistakes and a pinch of insecurities. But I like the way you were real, just the way every human is. Even if we didn't like few parts of you, we all have felt a little bit of you somewhere in our lives. It wasn't like an easy love you two had there. But you got it working time and again. And that's how we survive, not how we love. We talk a lot about love and clichéd forevers but none of us dare to discuss how reality tastes bitter sometimes.
When Cindy said, "I'm so out of love with you, I've got nothing left for you, nothing." She must've felt like an empty jar. A jar that was once filled to the brim, but wasn't restocked timely. And one day it ran out of love, love for Dean. You two, taught us that no matter how many patches you put on your relation. It'll crack up again if it doesn't heal well. And if you put too much of pressure, it'd probably just break.
I hate how Dean walked away, and I hate it more when Cindy lets him go. But I know that was the right thing to do, even if their love for Frankie was perfect. And Frankie is probably us, the little innocent child. One who gets tricked into a father's promise, and stuck with her mother's ambitions. One who smiles with a hope and cries out of fear altogether.
The blue in the Blue valentine probably stands for the blues that come along loving. Or probably, blue is the shade we leave at the end of our love stories.