Depressed

I just tried on my bridesmaid dress for my brother's wedding in early October. It doesn't fucking fit!!! It's too small, which means I've gained God knows how much weight between the time I called in my measurements (which was only a few months ago) and today. I couldn't even get the zipper up. Not even with assistance from my boyfriend, who, btw, is really being terrific, but I'm so fucking depressed, I can't even properly appreciate how wonderful he is. I have no money for the major alterations this damn dress now needs and, oh yeah, btw, I'm fucking fat. I used to be in awesome shape. Thin, healthy, six pack abs (well, almost) cut thighs, rocking guns... now, I'm a flab-fest. I'm so upset and so depressed. I don't even know what to do with myself. And I'm taking him down with me. He feels how down I am. I can't snap out of it. I'm so unhappy and disappointed with myself.