My ex left me because I'm fat. :(

if that was his excuse and if that's a reason he not only an @$$hole but a coward too

So he'd still be an a-hole for leaving because he doesn't love her anymore? I'm for supporting people, but really we're only hearing one side of the story. His version could be different. I am supposing no one here personally knows the OP or her ex, so we can only go on what's she's said, but to say the guy's an a-hole without really knowing the full facts is a little judgmental.
Just saying don't take everything you read on the internet as gospel.

When my wife admitted how unattractive I was fat, I never took it as anything but a wake up call.
Eventually, she'd have left, and I'd have had only myself to blame.
Love is not blind.

And if the shoe was or is ever on the other foot, I'd be gone.
Part of compatibility with me is staying fit.

Like my wife, I am totally turned off by obesity.
I would divorce her and she me.

That's reality.

That's sad.

No, it's reality which is why she remains in peak condition, we've been together 30 years with 5 kids and are very happy.

For any relationship to last, both parties must be HONEST!
I've been married longer than probably anybody on this thread, so I think I am qualified to say that honesty about sex and attraction is a key ingredient to maintaining a solid union.

The sad relationships are those where everybody says everything is fine when it is not.

It's true. Honesty is absolutely essential. And obviously the relationship is working for both of you.

But I wonder; if she had a health concern that required her to go on medication, and she blew up (prednisone comes to mind), would you drop her like a hot rock? Would she you? Is that what you're saying here?

Are you saying that if she for some reason became depressed and fell off the health wagon and gained weight, you'd walk on her rather than support her through trying to help herself and become fit and well? Would she you?

Or are you just saying that if she just totally gave up caring, for no other reason than that working out and eating right was tedious and hard, and would not help herself no matter how much you tried to support and encourage - then you'd leave?

Because the latter is different, at least to a degree. It would mean your spouse became an entirely different person (although I still think such a scenario might be caused by underlying issues, I'm trying to understand your position) and gave up on your marriage, and if you tried to fix it and she would not meet you halfway, you could possibly be justified in walking.

But this situation was not the latter, and the guy was a total cad.

I know the feeling. Im in the middle of a divorce and one of the reasons my husband said was because I'm fat. He also said it was because things weren't working out. Weve been together for almost 13 years! And just now it's not working out?

But you have to be happy with you. I am in the same boat. I can't be motivated right now to save my life or marriage! I say I want to lose weight for myself but I really want to lose weight cuz I want others to find me attractive. If I'm not good enough for someone who is abusive than who am I good enough for?

I know I keep going back and forth about what you need to feel about yourself. It's hard to stay motivated when someone you care about says and thinks horrible things about you. But you should try and have supportive people around you.

You have done aswome so far! He just wants the looks not the whole package.

right, you know what, excuse the language that everyone else has been more subtle about, but you ex is a total, utter *kitten*. in every way. he's a total prick and doesn't deserve you, never has. tell him that you've lost a lot of weight very quickly...him! then pick yourself up, dust of your trainers, and you prove to that jerk that you don't need him to do anything...including lose weight. be the most gorgeous, beautiful, confident person you can be, THEN WIPE IT IN HIS FACE.

What others have said

Things will work out for you -it's just the time that it may take that sucks

Break-ups happen to us all...and no matter what they are difficult to deal with. Add into the equation his jerk-ish comment and attitude, and it makes it seem impossible to bare! I have had my share of heart aches (and ashamed to admit...I've done my share of breaking hearts as well.) What I've learned is this: 1. It is not your fault...and everything happens for a reason. Sometimes people are not meant to be in our lives forever. At some point he may have been needed in your life, but his purpose may be over. When this is true, trying to hold onto him will only prolong the inevitable and make you miserable at the same time. So NO REGRETS!!! Nothing you could have done, no way you could have changed would make it right if it wasn't meant to be. 2. Sometimes we have to be thankful before we see why. After some break ups I thought I wouldn't be able to breathe, eat, live. Now I look back and laugh. Today those same men I cried over are major LOSERS! I would have been miserable with them!!! 3. Jokingly, I once said that if it weren't for break-ups I would never have improvement in my life. Of course this isn't completely true, but break-ups do have a tendency to make you want to re-evaluate things or have those jerks regret the day they ever left us by improving ourselves. In the beginning, we make positive changes to make them sorry they left, but slowly over time...you start making the changes for YOU!! Not sure if all this helps, but definitely helped me! Good luck, and remember no matter what happens you deserve more!