No, you are not required to include all your debt obligations. You will however include all unsecured debts in the Chapter 13. This is to your advantage as unsecured debts drop to 0% interest in the plan and payments are deferred until you are caught up on all secured debts. You will be required to pay only the amount that you can reasonably afford to pay on these debts. The unpaid balance of these debts will be discharged upon the completion of the plan.