Their first meeting wasn’t anything special. Her attention had been split between encouraging Kurt and focusing on her own performance, so Rachel hadn’t really given the boy a second thought when he came up to them. Sure he was cute, but he was Kurt’s classmate. A Warbler. Competition. She had more important things to think about.
Blaine has never been in the middle of a love triangle before. It’s not even a triangle, really—more of a love angle. He’s in the middle with Kurt and Rachel branching off on their own, and he doesn’t know which way to go.
She kisses him while he’s in line for coffee. Her lips are soft and warm, and he can taste traces of her white chocolate mocha on them, and beneath all of that is just the taste of her. That kiss marks the ending of Blaine’s only liking boys. It marks the end of the confusion and the end to the loneliness.
Their first kiss was the result of copious amounts of alcohol and the random chance of a spinning bottle. That doesn’t make it any less important, though.
There’s something lurking beneath the surface of their relationship—in Rachel’s mind, anyway— and it tells her that one day, Blaine is going to wake up and decide he really does like boys better and drop her faster than a hot potato. That’s why she kisses him like each kiss may be their last.