Go you! I've been wanting to stop drinking soda too, but I'm such a Dr. Pepper addict. The one time I did stop, my dad made me start again because we had two cases of Dr Pepper that he didn't want me to waste... I only drink a can or two a day though.
Oh and side note, 120 is pretty thin for your height. I'm the same height and I'm about 135 and I'm pretty thin myself, so I don't think you really need to lose any weight. Healthier eating and exercise are always good, obviously, but you don't want to be underweight either.
You need m'lovins!
I've been a member of this site on and off for over seven years under different user names. =]
"You know, I sometimes think we sort too soon..."