I was once addicted to sugar too. Good for you for realizing you need to stop!

It certainly is draining, and for me it was also fattening.
It is going to take a certain amount of sheer willpower and pain as you go through "withdrawal". But what helped me was substituting less-bad things for soda, sugary snacks, etc. I had heard that when you crave sugar you really need protein. So when I was dying for a sugary pastry at 4 pm, I would let myself have a savory treat - it could still be unhealthy and delicious, containing white flour, etc. but the main thing was substituting a different taste when I craved sugar. I also tried to get a little protein in the snack - cheese or meat or nuts. I'm talking hot-pocket, slice of pizza, chili nuts - junky crap

anything as long as it wasn't sugary. I tried to make it as easy for myself as possible. Then I would have satisfied the junk food craving and I would be full and able to resist the sugar craving. And slowly I weaned myself off the need for the sugary taste. Once you no longer crave the sugary taste, it's easier to then shift your snack choices to something healthier, like a cheese sandwich, hardboiled egg, non-flavored nuts, even veggies with dip or something

Also, try substituting juice (the no sugar added kind) for soda. You can combine it with half mineral water too if you want the fizziness. It's true that juice is full of sugar too, but it's still better for you than soda and will take care of the need for a sugar hit in beverage form. Then when you're used to not drinking soda you can slowly cut down on the juice and/or switch to whole fruit.
Herbal tea (there is a huge variety out there!) with honey is also good if you want something non-caffeinated, warm and sweet but not full of refined sugar.
Just keep at it and soon you will get used to not drinking soda, etc. When your inner self whines for a hit of sugar, be your own parent and don't let yourself have it, for your own good! Good luck!
