Daily Struggle

I've struggled with eating disorders in the past and I've overcome them. But this time, I don't know if I can. I can go all day and be fine. I eat healthy, and I don't try to get rid of it afterwards. My struggle comes later at night, when the craving for sweets hit. I'll sit there fighting with myself because I know it's not good for me. But I always end up giving in. I'll stuff my face with all kinds of sweets. I'll eat to the point of being extremely uncomfortable. Then I'll go and throw it all up because I don't want to gain weight. I do this everynight, and everynight I tell myself no more, but it never works. I have no energy and no motivation to do anything anymore. I've completely isolated myself from the world, and I hide what I'm doing because I know it's wrong and I'm embarassed by it. I'm not super-skinny, I am trying to lose a few more pounds but I can't do it because I'm struggling with this. It's addicting, and I need help. I want to stop, I just don't know if I can.