You can just decide that beauty isn't important. And when you do, it's OK that some days you just cannot be positive. Some days you can just live in your body and give yourself space to be not ok at all. It's completely ok to look in the mirror and be sad that your stomach is a curtain for your pubic hair.
My personal relationships are great, I'm doing alright professionally, I live in a great city, I'm getting married soon. Things are not bad. It's a new feeling, this one I'm feeling, and I'm pretty sure it's something close to peace, but not quite. I still struggle with accepting my body, but not in the same way I used to.
I can't accept the plus-size body I was living in because it was a diseased and uncomfortable vessel. It has less to do with my looks and more to do with the quality of life. Not accepting my 300-pound body didn't mean I was a bad person or that I hated my body--it just meant my body needed to change.
Runners aren't a one-size-fits-all kind of group -- you could weigh 110 pounds or 310 pounds and still call yourself a runner -- but people often have trouble labeling themselves as such if they feel like they don't fit the typical mold. You know, the kind of ropy, wiry mold you often see on the covers of running magazines.