You don't like talking to strangers, but you post on GreekChat?
Seriously, get therapy. Therapists aren't there to judge you - they're there to help you. Your mother may not be the best person to talk to because (a) she knows you too well and (b) she'll always put her own spin on what needs to be done to fix you. Friends are nice to have, but often they aren't equipped to help people who need serious help, and even if they are, they're your friends, and they won't want to hurt your feelings. You need help, not enabling, or validation.
Physical activity doesn't help with depression and anger, but it does pump lots of lovely endorphins through your body that can really do wonders for improving your mood. If you make that physical activity a habit, not only will you feel better, you'll look better too.
Also - get a dog. No, really. Dogs are amazing for people who may be suffering from depression or other mental illnesses. Somehow dogs just know when you're down, and they pick that exact moment to come over and stick their heads in your lap and cuddle up next to you. I miss having a dog.