You are right in that bypass won't cure the addiction. It never promised that. It is a tool that limits intake and creates a bit of malabsorption, but does not cure the head part. That is the work you have to do and it will probably take a good amount of therapy. You are clearly getting the endorphin/serotonin/dopamine release from the sugar. Sugar stimulates the same pleasure centers in the brain as cocaine, which is why it is so addictive in its own right. The good news is that if you can avoid all sugar for 3 solid days, the cravings will actually decrease. But you can't let it creep back in, or the cravings come back as strong as ever. The bad news is that you are going to have to work on figuring out another way to relieve stress, boredom, anxiety, or whatever else might be triggering the need for this sugar hit, and to find better coping mechanisms for dealing with the triggers.
You are not alone. Many people deal with this and are able to overcome it. Congratulations on your weight loss thus far. The tool is working for you, but it can only do so much. Best of luck and I really do encourage you to get some therapy to gain some insight and tools to help you be successful for the long term.