I see you've already made your choice
for what its worth, I dont think there is a *bad* answer - if you had gone ahead with uni this year that would have probably worked out, but defering for a year and concentrating on your weight works too
I actually wish I had worked a year before uni rather than rushing in after highschool - for a lot of reasons that had nothing to do with my weight - so there are other benefits as well.
Speaking in general of your weight holding you back from things, I too get this a lot. For example, I dont go out much anymore - I mean, I will if I really want to, its someones birthday etc. But otherwise I feel too self concious, and think I will have an awful time, have nothing good to wear, look chubby etc. But the thing is, those times I do censored it and do it... I actually have a great time! And I do regret those times I've missed great nights, great oppotunities, just because I'm a little overweight. I dont really have any answers to this though
Anyway, sounds like this is your year
go get em girl!