well Sevensong, i had gone through some similar situations, but mine wasn't as bad as yours. Thing is that, we just have to bear such upsetting situations though we feel extremely frustrated, because the grades, marks, are all in their hands, they are the boss. My suggestion would be:

1) try to show (by your facial expressions) that you like her and respect her (even though you hate her in reality) and that her suggestions are very important to you. ( i.e try to have a good rapport)
2) try to have a very clear discussion about what she wants. if required, ask her over and again, repeatedly confirm it in the days to follow so that she cant deny on the last day. but if you go one day then next time you go after several days, she'll have an opportunity to change her mind and harass you(this happened with me too).

i know you will hate these, but your aim is to get over her and be a graduate, so be ready to do anything that's required, even if that means bowing your head to her nonsense. (later on you can rate her bad)