The girl who has an obsession with you

One day by chance you helped a shy girl who was suffering from bullying, that girl began to follow you and shortly after became your friend, however the more time you spent with her her attitude began to change at the beginning it was a good thing because she left her shyness with you and began to give you more confidence but now it reached an obsessive point, since she is always behind you, she gets very jealous if you talk to another girl, she acts possessively and has tried to get along with