Would u be mad if...?

ok so this happened a while ago but i was wondering if u called ur friend Thursday night to see if she wanted to go to the movies with u on friday night and she said she would ask her mom and call u in the morning. then the next morning she doesn't call and in homeroom she says she doesn't think it'll work because her mom doesn't like unplanned stuff so ur a little confused because she didn't call u and it wasn't unplanned. then in study hall her and another friend are typing to each other on their laptops and turning the screen away from u then another friend tells u that she saw the screen and that they were planning on going to the movies that night (and they planned it that morning). so u and ur other friend start just ignoring them cuz u thought it was mean and then later on that friend that u tried to make plans with but said it was going to work tells u that she called in that morning but ur mom said that u had already left, but u know ur mom leaves way before u so u know she is lying...that's what happened to me and my friend and it's kind of resolved but ever since then she and another friend have been acting weird and we dont hang out as much...i'm not that mad that they made plans with each other but that they lied to me about it. so just tell me if u would be mad or if i was just being weird....thank u!!♥