welcome and I"m glad you found us
First things first - how were you diagnosed as having herpes? was it just a visual diagnosis? did you have a culture and typing of a lesion done? Have you had any blood work done? It will be important to confirm your diagnosis and to also find out which type you have at some point.
So how do you talk about this with your bf? Just be open and honest with him. Let him know that you were having X symptoms so you went to the doctor's and weren't you shocked to find out that they suspect that you have genital herpes. Let them know that you are awaiting the results of your own testing but that meanwhile he'll need to go get himself a type specific herpes igg blood test for hsv1and hsv2 so that you two can figure who has what in the next several days. chances are good that neither of you have ever been tested before for herpes so it's not like either of you knew you had this and was hiding it from the other. Once you find out if you have hsv1 genitally or hsv2 and know your bf's status then the two of you can figure out if you need to be taking any precautions or not.
Be sure to read the info on herpes here at asha and also check out the herpes handbook at www.westoverheights.com
and the patient counseling video on the same site. All are good sources of info and will help you start to educate yourself on herpes and how to deal with it in everydaylife.
Hang in there - I know this is a lot for you right now. The valtrex will help to speed healing of the lesions so that you will feel better sooner. The handbook also gives lots of ideas for pain relief too ( and so do many of the back posts here ).