You have hsv2 and you got it from sex most likely. Sometimes an outbreak won't show up until 6-8 months later so if you had multiple partners its hard to track down the time frame and partner. No matter what someone says you can get hsv2 on any part of your body. You should get a Valtrex perscription monthly and increase to 1000mg. Then you won't worry about it anymore.
Go get re checked when symptoms occur and still get a blood test no matter a what a doctor says and have protected sex always. Virul shedding can pass on herpes without symptoms so your boyfriend might not know if he has it.