AT MY WITS END! WITH MY EATING HABITS

I do not know what to do anymore. I have to lose 10% of my body weight in order to have this surgery done per my insurance company. But I just do not have the motivation to do so, I know if I really wanted this surgery done I would do it, but im seeing a therapist and also a phsyc doc, because I have bipolar disorder, and require meds. Could it be the bipolar thats getting me down or just the fact I am not motivated I have no idea. Its like I know what to do but just do not do it. I know I have to. I have had weight issues all my life. Up and down and up and down.. Someone please help!