"Wait for me." Three simple words, and they're all Rachel can hear. She sees Finn, and she should be so happy right now, that they are finally getting their happily ever after, but in her mind it's only Quinn. She can't let the last time she sees her before their wedding be her retreating form, running scared from a kiss that never should have happened. She'll know what she feels, what she should do as soon as she sees her. So she'll wait. Waiting can't be too much of a request for Quinn to make. She said she was on her way after all. She's on her way.
"Get it together Fabray." She tells herself over and over again. I have to be there for the wedding. To support her, her happiness. To object, and support my own. Back and forth, back and forth. She knows she's going to look like a wreck at the wedding. She doesn't have enough time to shower, and the intermittent tears that she still doesn't have fully under control are wreaking havoc on her makeup. But still, she has to be there. She turns to send a quick text, let Rachel know she isn't chickening out, isn't running scared. That she really is coming. "On my way." One second to send the text. One second to reassure her.
What a difference that second makes. The truck was speeding and wasn't looking. Even if she wasn't texting and driving there was nothing she could have done other than see it coming. But still, she didn't even see it. All she saw in her mind was Rachel, walking towards that oaf. And that hurt so much more than the impact.