Eyebrows arch, and Ruth lifts her shoulders in an apologetic yet resigned way. She's always been more than a little clueless when it comes to certain kinds of interactions, something that Betty likely has noticed often enough by now. She's never really had any friends, much less so romantic relationships, so she's a little blind to certain signs or cues that may just be obvious to people who've always hand normal and healthy social lives.

"I thought that was just because... I don't know, we were friends. And you liked working with me." She definitely never thought it was because Betty had any kind of interest in her beyond that, and she can't even begin to imagine what she could possibly see in Ruth. Betty, who is not only bright, but sweet, friendly, sociable, funny —not to mention ridiculously beautiful— is so out of her league that Ruth feels like she can't even see her properly from where she stands.

Or she thought so, at least. Right now her whole view of this relationship is getting thrown for a loop, so she's trying to wrap her head around that. But she does know the answer to that question, even if it takes her a moment to nod, smile widening as she steps a little closer. "Yes. Yes, I'll be your girlfriend." A pause, then she adds playfully, "But I maintain that I liked you first."