The only thing that I can suggest is to immerse yourself in things that you enjoy ~ clubs, sports, hobbies, etc ~ especially if this could help you to meet more people and make new friends.
Also concentrate on your school work, to improve your grades, etc.
And try to believe, in your heart, that the way you feel is something that you have in common with many teens, and that you will find the perfect girl, for you, when the time is right.
If this girl will not even accept your apologies, or realise that it is normal to feel as you do ~ without her getting angry about it ~ then she is probably not as 'ideal' as you seems to think she is. She may be more tolerant and understanding when she is a little older.
Accept that you can't help having feelings for her. Don't try to pretend that you do not care ~ but tell yourself that you will find someone else, with whom you will be happier.
