In economics there is what is called a sunk cost fallacy. It is basically what happens when you let costs you paid in the past which you can no longer do anything about cloud your future decision. You also need to assess your current resources and abilities, and figure out what your options are. Make both long term plans and short plans, and backup plans in case your original plans fail.
For example, you still have 6K you can borrow and Pell grants, so let's say with all that and the SSI you can afford another semester of classes. Your short plan can be to continue with classes to at buy you some time to implement a long term plan even if you can't get a degree. Your long term plan perhaps could be looking for a job. To probably want to find out what jobs wouldn't be hampered by your disabilities and start from there. Perhaps you can do some volunteer hours to beef up your resume. Go to the school employment office, see how they can help. Look for internships and companies recruiting on campus. And as your backup plan, maybe it could be finding alternative funding sources to continue in college and finish your degree. Perhaps you look at internships or anything else either related to need or your disabilities. You might even be able to get a work/school partnership going where you find a company willing to cover some school costs.
In either case, the truth is that while everyone has achieved different levels of success, almost nobody is truly where they wanted to be. I know I lost out a lot by blundering through life, I've only worked for about five years out of the forty I've been on this planet. And if four of those years weren't in the army, I've would have never had the chance to fail as many times as I've had in school, much less keep going as I still am. But that isn't exactly something I'd write on my Facebook wall either.
And for college, it means a lot of different things to different people. One thing it is not though, is a guarantee of anything. It can open up opportunities, teach you many subjects, help guide you on your path and provide a community of diverse students. On the other hand, there is very little that you do in college that you can't do outside of college, albeit with more effort required. This certainly goes for making friends which should be a lifelong commitment.