Same boat here I drink upwards of 150 oz of water a day, easily. I have a VERY occasional diet coke and M-F, 1 8 oz cup of green tea. I don't feel thirsty though - I drink it b/c it is there. At home, it helps quench the desire to snack, and during the day, gives me an excuse to leave my desk at least 5 times. Otherwise, I would be chained here & I think many of us could relate to that.
I have found I go less than what I used too & I chalk that up to my body using the water more productively. At first, it did not know what to do with all the fluid. I also have started running which ='s SWEAT! I sweat profusely now when I run. I can easily soak a shirt...
Just letting you know you are not alone Cheers "raises cup high"