This girl feels the need to copy what I do because she's seen TRP principles in effect. she's always asking me why don't I let her get away with anything... but now she feels like she needs to compete with me

for example

she wanted to meet up to get food at night yesterday but I already made plans with one of my friends so I said no I'm seeing someone.

fast forward to today, I hit her up telling her we should get food today but then she hit me up with the same line I used that shes seeing some people and I'm 100% sure she's not

How to deal with this