My bad day

The day when my best friend was ignoring me :'(  The thing that happened was in the Morning at the assembly time i was combing my hairs as they weren't looking good and i have to make them proper as i was in school. I didn't  know what was going in my friend's mind.. she was kind enough to talk with me that time.. but a sudden she went with an other girl,so i thought she must be telling some secretive thing but i tried to talk to her but she was ignoring. My feelings were that i would cry hard as she was my friend whom i was such as her sister.My reaction was she will feel better and would recover so leave her for one day! I thought i could do something that she may talk to me! i also said sorry to  her many times.If this problem comes again i would never ever do this again in front