You're missing an even more important point though.  Sure, he may love you unconditionally even if you turn into something that's barely even human, but do you love him then?  When you really love someone you want what's best for that person, often at your own expense.  I love my wife so much I want her married to an underwear model.  I know I'm never going to look quite that good but dammit I'm gonna try. Many of us would put our own lives at risk for those we truly love.  Fatties won't even put the twinkies down.  They'd probably be more likely to say you are brave for fighting society's standards and getting fat than taking a bullet for your SO.