To be honest it doesn't sound like you are ready to drop sessions and there's no shame in that. And there's no shame in being overdependent, that's obviously the stage your at, and eventually you will grow out that. If you are adamant about reducing sessions, the extra session you end up asking for, next time could you just call her and have a 20 mins check in with her? That might be enough for you. Or you could make up a list of things to try to solve whatever crisis you have before calling her.