Hi p1994, I'd say that the case worker can maybe get you more support as well as the support she may be able to give you. She might be able to help you link in with a support group, therapist, pdoc............And while any of these might be able to add to what the caseworker is doing with you it is probably good to have her around too to make sure things are working for you.
You know friends, family, teachers sound a really good idea to back up the professionals who should be helping you as well though. Those people can sometimes be at hand to support you/be there for you at the exact time you need someone to talk to. So yes it would be good to try and let them in as much as you can too.
Alison