I couldn't take a decision at all. Can u suggest some idea?

I like to have a girl as my best friend. Recently i came to know that she has a best friend. i tried to console myself and thought to move away from her, thinking of not damaging her good friendship.

But, i couldn't resist. whenever i see her, i feel the same always. Because of her thought, i, even lost my grade, this term. I just can't find a friend other than her. she has all the good character, i expect. Since i am a new comer to the school, many people feel as if i am a stranger. but, in fact, i need her. Once she told me that she cannot talk with me too much because she can't leave her present best friend.

i couldnt understand myself. its hard to neglect someone, which i like most. my mom told me that i will have friends and i don't have to go behind searching. My mom knew that i like the girl most, but doesn't know that, in real we don't have a relationship.

Can u tell. i am ready to forget, but how? i couldn't comfort myself. i always think, y a person can't have two best friend? But that girl, needs her best friend.

i don't want to be a fool. i am a good studying student and this term, tthinking of friendship, i lost all my marks.

What should i do? please be serious. to forget, what shall i do? Any way, i am sure that i won't get a friend other than her, because she was my long time search friend.

i am really getting mad. please suggest!