what would আপনি do in this problem please help !

i have a friend that ব্যক্ত she wanted to text someone so she went into my phone and got the guy i like's number and she knew that i like him she is still texting him 24/7 but says that its still a joke and she finds it amusing but she told him who she was .there for the jock is over but she still thinks its no big deal i really dont know what to do because shes flirting with him.. i dont know how to tell her that this is starting to get on my nerves because she flirts with everyone and trys to sleep with everyone too i really dont want this to get that far please help mee