I'm upset that my friend didn't encourage me
Do you think she failed to encourage you because of her personality?
I think she's just scared of giving me wrong advice.
You shouldn't be too angry with her. Her shyness is just who she is, and she'd done nothing else to anger you.
I don't care, I just want her not to be shy.
It is understandable that you are upset with her for not encouraging you but friends will make mistakes and it is up to you understand her. Talk to her and tell her how you feel and forgive her.