She upgraded. I bet you she was getting some looks when she lost the weight. That's one of the reasons why men and women don't want the other person to change in terms of losing weight and looking their best. Because they then have "options" that they may deem better than what they have now.
reminds me of my first love... when she got herself looking like a super dime, I felt really intimidated because I knew every man with a cock would want that ass... I know it's beta shit but what can I say, I hated her when she looked super duper ultra hot if I didn't look relatively as good at the same time, I could not be proud of her and enjoy it like I should have as a partner. And she knew she was ultra hot, but she wasn't a slag and that's why she was really annoyed of my insecurity. Maybe because my sexuality wasn't up to par with hers that I felt that way, but we had 'real love' tho. I pushed it away because I was a real head case with a lot of 'things'.
Selfishness, narcissism and bad self-esteem = break up