As someone who has given up alcohol and tobacco, I can tell you that yes, it is awful at first--and so is giving up sugary foods. But, I can also tell you that not only does it get better, it gets so that you no longer want them.
The longer you stay away from sugary foods, the more your tastes will "normalize." Most things of a dessert nature just taste too sweet to me anymore. It seems like so many companies and restaurants just want to add more and more sugar, and it's ridiculous.
Also, once you get used to portion control with starchy foods like potatoes and rice, the less you will overeat on those foods as well.
I can have some sweet foods now, in moderation, without going off the deep end. But I have to be careful with it. Some foods I just can't have in the house at all, though. So, I don't!
Hang in there! You can do this!
Jay