>lose weight and get fit
>now have hideous permanent stretch marks and loose skin
Fitness is a meme if you were born into the wrong family that didn't feed you right as a child. The choice you have as an adult to become fit has little impact on your life, its all determined before you have the option to choose and is based on luck.
I can't believe you wasted all that time despite that obvious fact.
your dumb ass lost too much weight too quickly. You should be lifting and still eating enough calories from good sources (ie. NOT junk food) to get some muscle bulk to fill in the loose skin.
You're still exponentially better off than you were when you were fat. Let the loose skin and stretchmarks be a reminder of what happens when your life gets out of control and move forward.