Why does my best friend ignore me?

Ok u sound like a freshman lol anyway I'm a guy and guys fix that problem by not caring but it's different for girls so here's wat I think. I think that she's going through alot she's in high school she has a bf shes got new friends u will always be her friend but she's just too busy and there are more urgent ppl she needs to be with like her bf. Don't get upset cuz she still likes u it's just she needs to spend her time with her bf and newer friends. Hope this helps:)