Gwen was all kinds of torn here. On one hand, she'd wanted to impress Alex, even going so far as to go out and buy a new dress just to hopefully make the woman speechless.
But on the other hand, she knew that Alex wanted to keep their new relationship hidden for now. So... compromise!
She wore the dress, hoped like hell that Alex would see it, but... otherwise? She purposely stayed away from the brunette beauty. She'd respect Alex's wishes, no matter how awkward it made her feel.