I believe i have herpes. what can i do to cure it?

There is not a: 'cure' per se. But it can be treated with antiviral medications. See your physician for acurate diagnosis ; a treatment plan.

Depends on cause: Aphthous stomatitis involving the common canker sore can occur in up to 15% of americans, and may involve some bacteria like staph epidermidis. However, similar-appearing aphthous ulcers can be seen with herpes, crohn's disease, and other systemic disorders, if you have multiple aphthous ulcers or frequently recurring ones please have the lesions checked out.