Why does my friend always ask me for my opinion?

It's not just a one time thing. She always asks me for my opinion on her grades, love life, body image, etc. For example, she always asks "do you think I'll pass the test?" "Do you think I'm fat?" "Do you think I have a bad love life?" I always give her my opinion, but I always tell her "Do YOU think you're doing well in school?" Whenever she asks me that. I want her to have an opinion about these things as well and not just depend on other people's opinions.
Why does my friend always ask me for my opinion?
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