I made a mistakeee! Is she using meee?! ):?

Ok, so my best friend was going to stay the night one night because I haven't seen her in a long time so we were gonna have a sleepover. Well, she was gonna leave real early to go get feathers so I told her that my mom said that she couldn't stay the night since she had to leave so early when she didn't really say that. Now she's really mad at me. Then I invited her to go to the pool with me & my other friend & she told me that we needed to take a break after that. So she pretty much told me that she was gonna go have fun with my other friend that she has recently started hanging out with & then leave me. Idid she go to be my friend or did she go beccause sh. Wanted to swim & be with my best friend?