OhLove, look at the progress you've made already.

I feel the exact same way you do (and that Shannon does!), in that I hate to see pics of myself or see myself in a mirror. I hate looking fat. Inside my head, I've already made the healthy change--I feel fabulous, mentally thin, as it were, and the outside has just started to catch up.
But you're on the right path. You're doing great. Those of us in the 300+ club know that it's going to take a while to get to our destination, but no law says we can't enjoy the journey. It's work, but you're already doing it.
I totally get the pictures thing. We have some family pics up in here, only 1 small set, and my husband and I are both just huge in them. We hate them. We keep them up (in a fairly inconspicuous place) IN THE KITCHEN, of all places, not as a motivator, just as a reminder--to my mind, it's different. I remember being inside that woman--I remember how she felt and how she wished she wasn't doing all those things that made her so unhealthy. And that's kind of a good thing--I have to remember, because I'm not like that any more.
HUGS to you.... that person in the pics isn't you. It's who you were then, not who you are now, and not who you're going to be.

Celebrate and look forward!!