Why

I don't understand
why she left me
why did she leave
why she knew I would do anything for her
But most of all
why did she kiss some guy and not even think of me
why does she throw me away like im nothing
why do I still love her and want her back when she just ignores me
What I understand most is
why she dont talk to me when she is with her friends
why my hear is racing when I see her
why im in love because she is mine no matter what she does