I am so sorry that no one took the time to respond to you by now. First of all be thankful that your new man has the intestinal fortitude to tell you that he has HSV 2. That tells me that he really cares about people and especially you to let you know his status.
I have been married and in a discordant marriage for close to 30 years and my wife still does not have HSV 2 and no condoms were used.Well occasionally but very seldom. That does not mean you will not get it. It seems that your man knows that it helps to take Valtrex to decrease the risk of transmission.
If he did nothing other than avoided sex when he had an ob your odds are that you would be 8-10% of you getting HSV 2. If he then does that and adds the Valtrex the risk is 4-5% of getting it and if he adds condoms then the risk of you getting it is 2-3%. All these %'so are based over a year.
You can still get HSV 2 genitally even though you have HSV 1. When it comes to having a family there is always the risk of getting HSV2. But the odds would only be in the 4-5% range presuming you do not use condoms.
The other thing that you have to decide is do the two of you use condoms or not. I see from your post that you really care about this guy and that you want this to work out if he is the right guy. When it comes to the Life Decision remember that every one comes into a relationship with baggage. His may be HSV 2 genitally and so you need to know what baggage you bring into the relationship.
He needs to be love just like you want to be loved. You have to decide is he worth the risk and from what you posted it seems that you feel he is worth the risk. To help you with more info read Terri Warren's book as noted in my signature line.
I wish you all the best and that God would help you decide what is best for you. If you have any more questions please ask and I will try to help you when next I am on the exchange.
To learn more read the Herpes Handbook. Terri Warren's book The Good News about the Bad News. It is available now as am e-book. Click on my avatar to get more details.