My friend savannah is going way too far over my boyfriend

Some signs are that she always texts him everyday,tells him I love you but when I'm around she acts like its a joke,plays with his hair,jumps on his back for a piggy back ride,she use to like him a lot,and she took my spot next to him in the bleachers.am I crazy or is this too far?do you think savannah likes him still?
My friend savannah is going way too far over my boyfriend
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