Tough situation to be in; especially since it’s gone on so long.
I thought about this before commenting, and realized what you’re describing sounds like a form of bullying. If so, bullying should never be tolerated.
I’m not sure this girl was ever a true friend. A friend would respect your feelings and try to change her behavior. It seems like this girl gets some sort of satisfaction from treating you this way. Maybe she needs help.
The fact you are no longer willing to tolerate this sounds like you are maturing in a healthy way. Whether or not there’s fault on both sides, this relationship appears destructive to you and may be impacting the rest of the team.
I suggest ending this “relationship” immediately. If this girl pays no attention to you, can you enlist the help/support of other teammates, friends, or maybe a trusted coach or counselor? Since it’s gone on so long, you may need help extricating yourself.
You have my sympathies. There probably is no pleasant way to end this; life is full of difficult situations. However, you will wind up with more strength and self respect.