The family factor can be difficult, but you can make use of all the family goodwill toward your current direction. Try emphasising these two points:
- You no longer care about your weight, in any direction. This is a huge relief to you after such a long fixation with thinness.
- You've been unhealthily thin for so long that your body (and your metabolism in particular) needs time to recover. That often means spending a good deal of time overweight before you balance out. (This might actually happen or it might not, because it's a real thing, but while they're waiting for it they will get more accustomed to seeing you bigger.)
On top of these, they will plainly see that you're so much happier, so it won't be much of a priority to pressure you about anything weight-related.
Hope it all works out for you.
5 years