I agree that therapy can help, but DBT didn't work for me at all. I find CBT (cognitive behavioural therapy) to be much more helpful, especially since I also have a comorbid anxiety disorder.

Don't give up. Try new meds, and routine, and exercise, and food choices, and therapy, and socializing. Try as many as you can. Sometimes you have to come at it from multiple angles. That does NOT mean you have to "pull yourself out of it", not at all. Just that you need to try something else. There is a light at the end of the tunnel. You'll get there.