UC is unpredictable at best. Even with staying on maintence drugs and leading a healthy lifestyle you are not guaranteed from flaring. You might live the rest of your life in remission, or have very few incidents of flares, or you could end up having to opt for surgery. There really is no way to foresee what will happen. The best you can do is follow your GIs advice and take advantage of each day of life that you feel well.
dx proctitis in 1987
dx UC in 1991, was stable until 1998
1998 started prednisone, asacol, pentasa, nortriptylene, ativan, 6MP, rowasa enemas and suppositories, hydrocortisone enemas, tried the SCD diet, being a vegetarian, omega 3s, flax, pranic healing, yoga, acupuncture, probiotics
2000 lost all my B-12 stores and became anemic
2001 opted for j-pouch surgery- now living life med-free