How do you cope with controlling/type A friends?

This is like part 2 of a question I already posted. But I have a friend who has these ridiculously high expectations on herself. She works full time, goes to grad school, her husband is some time of high level teacher at a middle school, she has two kids and has a major social life. She makes sure she goes to just about everything she is invited to, plus throws a lot of parties of her own. I do my best not to put excess pressure on myself and strive for balance. But her expectations stress me out. I get the impression she expects me to be like her and that she gets unhappy with me every time I dissapoint that expectation. When she wants to plan something with me, she calls the shots, and if I want her to change her plans and compromise she won't budge and just gets mad at me. Ugh this is a frustrating friendship, so how do you cope in that type of situation? The reason we became friends is because we worked together, we have mutual friends, and we are both devoted Christians...