I have a lot of sympathy for where you are now. My GP first suspected celiac when I had been quite sick for a just few months. I had above normal blood antibodies, but a negative biopsy. I was told not to bother cutting out gluten, and I remember the huge sense of relief as I was well and truely addicted to bread. If I had looked into things a bit more at the time I'm sure I would have found this board and got a good dose of reality, but I was happy to believe what I was told.
I saw a new GP about a year later, I had been gettng sicker and sicker over that time to the point where I could only eat about 4 foods that wouldn't make me immediately sick (all of them gluten free, funnily enough!). By the time she told me that the gluten WAS making me sick, I was so desperate to feel better that I was totally committed to the diet. I grieved, I got angry and upset, but I never deliberately ate gluten. If I had been diagnosed when I wasn't as sick, I may have found it much harder to stick to the diet. I was so debilitated that I couldn't eat our or go to pubs or parties, so it's not like I was missing anything socially.
You've been given a lot of great advice already, which I totally agree with! I do think gluten is addictive for some people, and I tend to think that if you find yourself feeling an addictive pull to any type of food, it's probably bad for you. I am about to start a restrictive low chemical diet, including cutting out most treats and so many tasty healthy foods (tomatoes, avocadoes, berries, etc etc), and I am dreading it SO badly!
A psychology subject taught me a really useful metaphor for self control - it is like a muscle. It only has so much strength, but you can increase it over time. Being gluten-free may take up a big chunk of your self control strength, but with practice it will improve. Find the triggers that push your self control past your limits, and try to mitigate them. Try to plan as many good gluten-free meals and replacement foods as you can to remove temptation. Talk to your friends about what's going on - they may surprise you with support.
I found it really useful to keep a periodic list of symptoms, e.g. before going gluten free, after a couple of weeks, then updated every month or so. It helped me to see what was improving (as they can me really subtle things you don't expect), and to keep me motivated. Given you already know that you feel better when gluten-free, it may help you stay on track. Good luck!