Wow! I find it totally honourable that he was honest with you! That must be so hard to do! I believe that everybody deserves love and I think it is great that you are both thinking of each other's safety.
Me personally, I would be nervous, but that's just me and has nothing to do with you and how you feel.
If you are concerned about your sexual preferences being unsafe for him, have you both been to a counselor together?
What ever happens with you two, I believe that you already know the answer in your heart and soul.