MOther not letting me go with gf.?

Okay so next weekend my mother agreed with me that i woul be allowed to go wioth my gf to a place an hour away for a wacation. with her parents. The date was moved to this weekend. Well this weekend she wont let me go because she will be two hours away.... having a great weekend! TEll me how this make since... her reasons for not letting me go is because she does not want to get the idea in my head that its okay for me to go stay with my gf.... hello she was going to let me go next weekend (so she says) (she woulda changed her mind anyway). Another reason is because she thinks i am going to have . (Meaning she has no trust in me when i tell her i am not going to, and she has no faith that she raised me up good enough to the point that i know not to). Lastly she says she is too far away to come to me if something happens (something could happen to me while she is in vagfes.... than what????) This makes no sence to me!!! Than she tells me she she is sorry that it makes me up set!!!!!!!!! ERRRRRRRR Really???????????????? What EVER!