Getting over your "X"

I hear from so many people who are desperate to lose weight - but "just can't" because of "X.""X" can be many things - bad back, bad knees (been there, done that) or "fat genes.""X" could also be lack of support.It is hard enough to live a healthy life, but to have everyone around saying, "You are fine the way you are, why bother?" makes getting healthy seem even more impossible!"X" is that