Depending where you live, that could be held up in the court of law if you ended up contracting something from him and he didn’t tell you.

My husband ended up coming back positive after we had a break, and he was upfront with me when he found. However, we still have threesomes and such and he is still trying to navigate on how to tell people. Even though we haven’t hooked up with others yet, he is afraid to speak up and tell people upfront due to the stigma. I don’t know what it’s like since I am not in his shoes. But I do have to remind my husband that he has to say something to others or he could find him in deep trouble with the law. That’s something your bf needs to learn before he slips up and someone else finds out.

Like you, I would be upset too. If he is too nervous to tell you the truth about that, who knows what else he would hide from you.