I also have genital herpes which I developed as a result of the affair. First and foremost, you need to do some research and arm yourself with as much information about this as you can so that any questions he has (and he will have lots) you can explain to him.
Second, if you are seeing a counsellor, you may wish to make an appt for both of you to bring this issue forward in a controlled environment.
Third, you need to be honest. If you have it and have been having urinary tract infections and they think they are herpes, he likely already has it to so he will need to be tested.
Have they done testing to confirm their suspicions? Saying they think that is the problem could be way off base.
My first outbreak consisted of really bad urinary tract infections because the blisters hurt so much I couldn't pee........and bacteria was getting into the urethra and causing urinary tract infections. Be careful they can spread higher up if not dealt with.
I'm sorry you have to join the club, but honestly I haven't had any issues in a long time, not since I got rid of alot of stress in my life. Stress tends to trigger these things.
You should check with your doctor, but I take a cranberry capsule everyday and drink lots of cranberry juice if i suspect a UTI coming on. Lately it has been enough to ward them off.
I'll try to post a website link shortly that will give you good accurate info.
Kid
http://www.racoon.com/herpes/
Here is a great info site and support group I found when i was diagnosed.