Uh, I need some relationship help.

I don't really feel comfortable sharing my name, so you can just call me Divine. There's also Wild and Shadow.

Well I've had a really big crush on Wild since the beginning of last year, and she knows it. We've been best friends since third grade. We had a falling out last year, but we've been friends again since the beginning of the school year. Around 6 months ago she was dating this girl named Shadow. Like, a month or two ago they broke up, and she told me that she she didn't like her anymore... But they're dating again. Apparently yesterday at lunch(whereas I had to leave before that and this might've been avoided) Shadow kissed Wild on the cheek, and our other two friends saw it, I suppose. I promised Wild that if I stopped loving her, or started liking someone else, I would tell her, but obviously that wasn't mutual since she couldn't tell me right away. I'm just mad, I suppose. I don't know when it happened, I don't know why she's dating her again, I don't know anything, and I'm afraid if asking because I may seem too pushy? I just, really need help with this, and thank you to whoever responds.