I don't think you can ever get away from situations like the one you're in. I just try to say "no thanks" and if I'm pushed, I reply that my body just can't handle that kind of food--which happens to be the absolute truth! If someone is particularly pushy, I'll say that I've worked too hard to ruin it. Sometimes it gets easier after a while because you get a "reputation" for not eating junk. But I've had even very good friends try to push stuff on me. Just stay firm and nice (through clenched teeth) and remember how hard you've worked and how good you feel.
Good Luck!
Carol F
Good Luck!
Carol F