If you French kiss someone with gentital herpes, can you get it or do you actually have to have sex to get it?
Yes, you can contract herpes from kissing. While the chances are much smaller when there is not an outbreak, and it is less likely to pass genital herpes through kissing, there is still a chance. You can go to your doctor for a blood test if you have concerns.
Best of luck to you, and here are some links that may help you learn more.
Herpes: Knowing the Risks
Genital Herpes: The Basics
The Truth About HSV1, HSV2 and Oral Sex
It's unlikely to transmit genital herpes through kissing, you can only catch herpes through oral sex or intercourse, as well as skin-to-skin contact where the virus sheds.
Since the virus sheds outside the vagina or anal area, experts advise wearing a condom and/or microbicide during genital touching or foreplay. Even some protection is better than none. Those who wore condoms 25 percent of the time reduced their risk of transmitting herpes as well, one study found and if a microbicide is used in all acts not protected by a condom, the increased STI risk will disappear.