Some people have shorter torsos and trunks, which will affect their visual proportions; a longer torso makes you look skinnier even if you’re overweight while a shorter one makes you appear wider.
Even if you lose weight, it’s no guarantee that you’re going to look like the cover of Men’s Health; a visible six-pack is as much the result of genetics, dehydration and favorable lighting as it is eating nothing but broiled chicken breasts and steamed broccoli and five hundred crunches a day.
Societal standards of beauty are not only arbitrary but often literally impossible to achieve without Photoshop and make-up and there are assholes out there who feel empowered to mock fat people with impunity.
But being large and in charge doesn’t mean that you’re doomed to a life of being forever alone; in fact, you may find that you have far more options for finding love, sex and happiness than you’d ever believe possible. There are plenty of notable examples out there if you look around. Seth Rogan is no Abercrombie and Fitch model but he’s also happily married.
The next key is simply to accept that your body is your body and your shape is your shape and there is only so much that you can do to change that.