Do you think I'm wrong to be mad or feel the way i do? my ex-friend I think was in the wrong?

[Renee]

My friend and I play a game on Facebook called war commander. One night i forgot my cell phone at her house. Her nephew rents a room in my house.p well he was over there he msg me on facebook to tell me I left my cell. I said I would get it later in the next day. This is where she over stepped the boundaries. Her nephew told me a soon as i walked out she had paper and pen and was writing things down. She went through every text msg and every Facebook conversation that was in my phone. I don't get it. We dont talk anymore cause i sent her msg to tell her i feel she overstepped boundaries. That is my private business. Right? Or am i wrong? Then she has been going around telling everyone that i did her wrong.