What step should I take?

I am having a friend umm she is, I think don't want to keep friendship with me. I sense it from her behaviour. I mean I wait for her every damn time. So that we can go together but she will come and she will talk to someone else who is also her friend and I will walk behind them but she will ignore me like I never exist as soon as we reach the gate she nod me bye and go away. I know her since first standard and it's been 10 years. But I think I should not wait for her because whenever she find her other friends she left me in between and go with them. Am I being clingy? She has many friends but I have only one. So I felt bad. Should I make another friend and leave her? You know if I talk she pretends she never listen it. I am an introvert so I don't like to being left alone in between at school campus. Do she really want that should I give space to her.

POV: i am also a girl. She used to be my bestie. We were together in every phase. Now we are in high school so she act like this

What step should I take?
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