You should THANK YOUR LUCKY STARS, GOD, THE SUN, MOON, THE BUDDAH, GO COFESS AT CHURCH, THANK THE DEVIL OR WHATEVER YOU BELIEVE IN. BUT YOU SHOULD THANK SOMEBODY THAT ALL YOU CAUGHT WAS HERPES AND NOT AIDS. AIDS IS WORSE. AIDS IS DEADLY - HERPES IS ISN'T.
If you were the one that was sleeping around and cheating on your lover and having uprotected sex, then you should be thankful that you ONLY got herpes and not AIDS. You should not have had unprotected pre-marital sex in the first place.