Yes, you should tell your partner that you have Herpes. it is ur responsibility to give the partner the truth.
Genital herpes is spread easily. The virus from contact with an infected person can enter your body through a break in your skin or through the skin of your mouth, penis or vagina, urinary tract opening, cervix or anus. Herpes is most easily spread when blisters or sores can be seen on the infected person. But it can be spread at any time, even when there aren't any symptoms.
over 50,000,000 of people in US with genital herpes. Most of couples deal successfully with herpes all the time. In most cases, it is only a minor inconvenience. I am encouraged greatly after browse their sucess stories on this herpes datig site: http://www.stdpal.com.
I bet that You and your partner will be exciting after you check out their stories.