To squat more than her boyfriend can? Girl in the photo is flexing in good lighting, they probably don't look quite so massive in person and otherwise she looks great, taking pride in her physical fitness. Those legs and her general physique looks quite a lot like you'd see on a track cyclist, maybe she does race.
Do you live outside the city? If so buy a mountain bike, swap foods for healthier but equally delicious foods. It'd get you off your ass, the exercise might help with the depression and would certainly be an enjoyable past time, not to mention physical benefits. I realise people giving "advise" isn't always helpful, but meaningful differences often only take subtle steps in the right direction, hard to initially take the step but amazing feeling when you do.
Was a thread that popped up around the topic of depression/mountain biking on Reddit just yesterday - https://www.reddit.com/r/MTB/comment...ng_to_help_my/.