How do you get over a crush quickly?

I F21 realized recently that I was bi and that i have a crazy crush on my friend. We've known each other for 4 years, and we even admitted at one point that we both liked each other as more than just friends during our early friendship days. A while ago, i revealed that i was scared all lips would feel the same when kissing (long story), and she responded by kissing my fingers to see if i thought her lips felt different. Ever since then, all hell has broken loose. Problem is that she's currently dating someone, and i dont want to freak her out by telling her my feelings.

The issue is that I feel like im betraying her trust and the trust of her girlfriend by having this crush. When we're together, I feel like my system is on overdrive, and im terrified that one day ill spill the beans. On top of that, I'm lowk repulsed by the thought of being in another relationship, and my body aches when I think about how we will never be in one either.

Overall, the bi experience sucks. All of these feelings are a lot more trouble than they're worth, but i don't want to lose her as a friend.

What is the quickest way to get over this crush? I just wanna move on :')