I only told a few people. I was afraid that the surgery wouldn't work and I didn't want to be embarassed once again when I didn't lose weight. After losing 40 pounds I was so excited I told everyone I came into contact with even complete strangers. Now, I am sort of regretting telling everyone because I feel the pressure is on for me to continue to lose the weight. I guess that can be a good thing to keep me honest.
I wouldn't worry that you told people. Just remind them that it is not gastric and generally you will not lose 100 pounds in 3 months. Tell them it is a slow process and that should help reduce some pressure on you.