I don't really care. I just don't want to look like a hobo. Though I somewhat cared when I wasn't asexual. And I still hate old photos of me, where I'm trying to smile. Which is basically all old photos lol.
I think it's sort of natural (due to evolution) for women to care a lot about their appearance, as that increases the amount of mates they can select from. They like to groom themselves, so they feel better. And it's a source of unnecessary self-esteem issues. Many men will still find you attractive when overweight. One of my gfs weighed more than me, and I didn't care. Don't waste your time with negative thoughts about your appearance. If you can't change it right now, maybe you'll find a way to change it later.
You also don't need to have the perfectly symmetric face of a supermodel for men to find you attractive. Do you have something about your face which you like? E.g. your eyes? Then focus on the eyes when looking into the mirror.
I may call myself fat because I'm slightly overweight. But that's not really a self-esteem issue. I don't have negative emotions when doing so. I'd just prefer to weigh a little less, because it's a health issue.