Nurse Eva here. The doctor is currently busy seeing other patients.
If this is the first time you've had a crush on a girl, it can be quite confusing. But it's all natural. It happens to everyone, and none of us has any control over it. Despite how it feels right now, you WILL get over these feelings. It just takes time. (It may seem like a lot of time.) Even if you want the feelings to last, they won't. So enjoy it while it lasts.
The important things to know are these: Even though the feelings are so intense that it seems like they will surely last forever, they won't. It's a temporary hormonal/chemical imbalance. You will feel like this about many other girls in the future. And this isn't "love," it's properly called "infatuation." Infatuation is hot, it is nervous. Love is calming. Love wants whatever is best for the other person without any regard for itself. Love comes as a result of what you have been through with another person.