I think I'm going to tell my mom that she is shallow.
Is this why you're not going shopping with her?
Yes, I'm not going shopping with her because she is shallow
If you do think this about your mom then having a mature conversation with her could help her improve. Sometimes one isn't always aware of their faults. Just be kind and tactful and perhaps you can help her grow and change.
Sometimes she just switches conversations like they're nothing and it would be nice if she would listen to what I have to say.
Hopefully your mom will listen to you this time and you need to be direct with her when you have this conversation. This is obviously an issue that bothers you and you deserve to be heard and have your feelings respected.