You look amazing! I honestly think there is a connection between being in an unhealthy relationship and weight gain. I too went through this with my last ex ( it didn't help that he was 300 lbs and didn't have a healthy lifestyle)...Perhaps when we're stressed we eat more..self esteem is much lower, depressed, etc. I am now in a happy and healthy relationship and I guess that gave me the push i needed to become healthy again.
Wishing you the best of luck! 77 lbs is a MAJOR accomplishment..be proud girl!
Gosh, you`re beautiful! You are also beautiful in your before-pics but on the current ones, you are just stunning! Nothing to be depressed about - quite the opposite!