Going public

My impossible goal is to lose 87 lbs by the end of next year. One of my worthy fails is to tell people my goal. I’m afraid to tell people about it because I have a fear that it won’t happen. Can you help me with this model?
C- telling people my goal
T- if I say it and then gain I’ll look like a fool
F- uncommitted
A- if people don’t know, I don’t have to be accountable
R: I can quit.

C- telling people my goal
T- ?
F- Determined
A- ?
R- be 100% committed to reaching my goal.