<human>: Can you summarize the given text in a few sentences?

We're both 30.  She knows she's been gaining weight but just won't do anything about it.  At all.  She has a treadmill *in her house*!  

It really hit me when I was looking through some older pictures.  It's pretty bad.  And what's worse is that the weight went on in all the wrong places.  Her face is now a totally different shape.  Instead of bigger hips, it all went right above her hips and to her middle thigh.  She went from slender-hourglass to looking like a skinny female version of [Carl] from Aqua Teen Hunger Force.  Not only that but the second she gets home from work she throws on a sleeveless t-shirt, sweats, and flip flops.  Not even kidding.  

She's prone to depression, so that is definitely a factor.  It's also what makes this so tough.

Not that this matters, but I've been conscious of my own weight lately and have been trying to get in better shape.  Nothing crazy, and it's not like I'm some Adonis who needs her to keep up.  I have tried to get her to do some challenges together, like we both promise to do a mile 3 mornings one week.  She says that me mentioning it depresses her and makes her want to sit and eat more.  So I can't say anything about it, but she just keeps watching tv.

I don't want it to, but the honest truth is that my sex drive for her is nonexistant.  There are places I know I can't touch because they are squishy and she gets self-conscious.  She has a few drinks and tries the old sexy outfits, and they just look silly and awkward.  Sex is a total have-to thing.  That's so unfair to her and to me.  I long to have sex with the lights on someday, and she probably wants someone to attack her with animal passion.  

Given the previous responses to my suggestions and encouragement, do you guys have any outside-the-box ideas?  I'm starting to feel decidedly "cousin" ish about her and that just sucks.
<bot>: Despite me not wanting it to, my GF's weight gain has killed my sex drive.  She's depressed about it and spiraling...me trying to help makes it worse, and I've tried all the diplomatic approaches.