@Julie_Martin I know you posted this about two days ago. . . but I thought I'd add what advice I have to offer, just in case.
First of all, those hyper butterflies? BEEN THERE, GIRL. I know exactly how it is to see a guy and for some reason those darn butterflies start up inside your stomach, and everything just kinda starts feeling like it's buzzing and if he talks to you ( heaven forbid ) the butterflies decide to fly into your face and you just feel like an overheating fire engine. . . -sighs- Yeah, it's not the best, and I empathize. The thing about crushes, though, is that you can't just give into them and hop on the joy ride they're offering (for 25% off!) A lot of emotional damage can come from that, and I know what you're probably saying, 'oh nah, I'm not doing that! I'm totally not gonna follow those feelings in fact I'm chuckin' 'em!'
Sometimes, giving into the worry that crushes can cause is the same as chasing after those feelings or the person themselves. You're still letting it take that much of your time. In reality, they're kinda only skin deep feelings, that 95% of the time taper off at the most random of times.
Until that happens? Hang in there. Keep God as your first priority and ask him to guide you through this. Squashing your feelings into a can, then throwing that can into a dumpster, and shoving the dumpster into a trash compacter-- yeah, that doesn't work so well. You need to come to a close with your feelings and deal with them, no matter how messy it might seem. If you don't, chances are they'll build up and explode. If you need help, there are older sisters, mentors, your mom, (and in this case XD) forummers, and God to talk to and ask for advice.
As unsavory as this sounds: There is no magic button to turn off crushes until you're ready to date. It just. . .doesn't really happen.
On the bright side? This is when you can learn how to handle crushes, grow stronger in your faith, and set your standards for That Guy (tm) when he does end up coming along.
My advice is don't go with ZB. Though you already knew that. I can also understand how frustrating it is to have a crush on a guy who. . . just. . . really. . . is not. He's just not, you know? That's why guarding against that joy ride of impulses (50% OFF!!) is so important. As for Ash, he seems like a nice enough guy. I think he respects you much more than ZB, and definitely sounds like an older bro. If he's worth his Pringles, he'll understand if you tell him about your feelings and will communicate well with you. Beyond that, it's up to you to decide what to do now, Stan. (Can I call you Stan?)
Anyways, I hope this helped in some way! If it didn't, I'm always praying for ya, and I'm sure God will carry you through this. To get some perspective: They're just crushes, and everything will be okay in the end.