How do I stop my friend from asking about every detail of my business?

I (16F) run a small online business that usually does pretty well and gets a lot of views and orders sometimes. My best friend (17F) asked me to teach her because I used to bring the materials to school and work on orders during leisure periods. Now she has started the exact same business as me. She did asked me if maile naramro manchu ki nai, and I said it was fine since she’s not very well off.

The problem is she keeps asking me every little thing about my business—even things that honestly shouldn’t be shared. She also asked me how to make our most-selling product. I tried making excuses because I didn’t really want to teach her, but she kept insisting ani i did end up teaching her.☹️

She’s a really sweet talker. kasto thikka parcha ani ma usko kura ma aauchu ani milai milai sab kura sodhxa ani i can’t even deny it. Nowadays it feels like that might actually be her strategy.

Since we’re in the same area, it basically feels like competition now. I might be overthinking, but my main problem is that she keeps asking me everything about my business and I don’t know how to avoid answering without making things awkward.

Also she keeps copying everything i do, it’s honestly really annoying smtimes😭