Ok, I seriously need help.

Okay, I think i can give 你 some advice.

你 pair are 14. And 你 both had/have BF, meaning your friend may be Bisexual. But at the same is at the age of 14, everything is soo new, 你 want to experience everything now and then.
If your acatually worried that she may have a crush 或者 feelings for you, don't stress, because no matter what age a woman is, they will at least once feel something for a another woman. But being young means nothing's permant.
Follow your heart. What does your sex-drive tell you. When 你 get horny who do 你 think of without any control on the thought. Do 你 think of her kiss,not because it was so shocking but because 你 want to do it again and again.

Also, experimenting with 老友记 HAPPENS ALL THE TIME. I know me and my best friend fuck every sleepover, single 或者 not . (we've cheated with each other :P)But still no strings attached.

Close your eyes, and imagine yourself holding her hand, standing behind her and holding her waist, brushing her hair, looking at her lips, embracing in the photos. Can 你 picture yourself being with her, 或者 does it upset 或者 gross 你 out.
Since the kiss, have 你 been thinking about what it be like if another girl kissed you?

But being at the early stages of teen means that 你 beleive and want to experiment and be unique, but time will reveal wheither where your 心 lies. Don't stress yourself out, and dont make your friendship awkward.

But if 你 want to talk to her, just talk to her, she's still your friend right, talk to her normally. She kissed you, so It's not like its going to be a shock to her.