I agree with that approach in most trivial situations, but work is different. If a group of people is to spend so much of their lives together, they might as well push each other to be their best. It doesn't seem like she brings the best out of you. I am in a leadership position right now, but that does not privilege me. I take great care to listen to my teammates and facilitate a discussion. When someone is acting like your boss might, I will be honest with that person about the effects of their attitude on the project. Asking others for help and sharing your thoughts are very constructive things, please don't be discouraged.