L.T.
I'm sorry for what you are going through. You don't mention if you son takes medication or if he is receiving any kind of counseling. Those interventions could help. If you are interested in therapy ask your son's doctor for a referral to a child psychologist or behavioral specialist or "wrap around" program. (You could also ask a counselor at your son's school or look in the yellow pages.) They will work with your son on appropriate behaviors and also guide you in how to deal with his disorder and behaviors. By the way, these services should be free in PA through the medical assistance program.
If you aren't seeing a counselor for your depression, you may want to consider that as well. Feeling good about yourself and learning coping strategies will help you focus your energy and tackle the difficult issues you are facing. Good luck to you!