Thank you
OP, it's easy. Just don't focus solely on her. The more women you talk to, the less caught up with one you will be. Not to say you won't find some you like more than others, but having options alleviates a lot of that.
Trust me, I've met girls who just weren't feeling it for me at the time, but I was always spinning plates so it wasn't such a big deal. Some come around, some don't. Forget all the "friend" stuff, it's BS, just a thing a woman says in the moment. Just relax your focus, there's a whole world of women out there. You can keep the door open for her. The other thing you can do is assess where you can improve to reduce the chances of it happening again.