There was a part of Faith wanting to defend Castiel, even though she thought he was some place beyond stupid for taking Ruby back. It was a large part, admittedly, but she forced it back. However she felt about their relationship it wasn't worth arguing with Sam about. Or adding to the argument it seemed. So she just shrugged, dismissing that point and conceding that she was indeed letting it go.
But the rest of it was another matter. "Without me getting what?" She arched her eyebrow, looking directly at him. She wasn't shouting, or gesturing, but nor was she backing down. "Without me getting hurt? Without me feeling betrayed all over again? You broke my heart. You were having an affair for months and because of that, I'm never getting back the---" She paused, breaking the eye contact for a moment before she looking back, her gaze scrutinizing.
"When do you think we got together? When do you really feel our relationship started? In April, the first time you kissed me, when you first said you loved me? You want to know when I feel our relationship really started? July. When I was crying and you could barely stand up. Those first couple of months may have been the happiest I have ever been in my life, but they were so filled with lies and betrayals, with you sneaking off to be with her, that I can't believe that any of it was real. July, when I was feeling like my heart was ripped out of my chest, that was when it became real." She hated admitting that. She hated that the first time they kissed, the first time they slept together, the vacation they took, all of it was irreparably tainted by the affair.
"I didn't doubt you for a second when we found you after Eve took you. I have defended you to everyone who questioned you, even Angel. I have done everything I could to make things better for you with your family. I have talked every time you wanted to talk and I have stayed quiet whenever you asked so don't you dare imply that I haven't been supporting you or that I don't have faith in you overcoming the addiction. And I am sorry that even though, yeah, I do understand why you've been talking to her, I really do, I just can't keep going with the never ending support. This is where I draw the line and I stop being super Slayer and I'm just a dumb girl who can't face the idea of getting her heart broken like that again. I'm just not strong enough to do that." She finally looked down at the table, unable to keep looking at him any more. "I know there are secret messages going on. And I know all you're thinking about is her and it feels just like it did before."