Congratulations on your upcoming graduation! I thought high school was hard enough, and I was healthy. You have my utmost respect for surviving it with UC and the obstacles inherent with this illness. I've got a couple of quotes that might be good. They are kind of mushy though...
Yesterday is history. Tomorrow is a mystery. Today is a gift.
No matter how cold the winter, there's a spring time ahead.
You are never given a wish without also being given the power to make it true.
You may have to work for it, however.
And one that I'll throw in just because I find it amusing:
Just because I go to the bathroom a lot does not mean that I am full of crap!
36 y.o. male
Diagnosed w/ moderate UC in May '06
Asacol, Florastor, VSL#3, Wellbutrin XL, Prozac, multi-vitamin, Allegra, Lialda, Colocort enema, Prednisone (trying to taper down)