It is possible you were infected by your partner, but someone can be infected with Herpes and not have symptoms for months or years. You don’t say if this is the only sex partner you have ever had, so you may have been infected at some other time. Additionally, if you are someone that gets fever blisters on your mouth, this is caused by Herpes. We used to say the Herpes Simplex 1 caused fever blisters and Herpes Simplex 2 caused genital infections. Today, someone one can have Herpes Simplex 1 or 2 on their lip or in the genital areas.
He may test positive but not necessarily. Both of you need to see a provider that can test for ALL STDs and can give you information on how to protect yourself from exposure in the future. Herpes Simplex 1 & 2 are caused by a virus and cannot be cured; however, there are medications that can be used if you experience an outbreak. Lastly, if you are positive for Herpes Simplex 2, there are precautions that will need to be taken should you become pregnant. Again, your health care provider will discuss this with you.