First, thank you for being a supportive SO; you are a treasure which so many of us can only hope for. Second, keeping secrets from spouses is not a good thing, and you deserve to know. This is why we encourage those who are still in the closet to have what we call The Talk. I suggest you pick a good time, sit your man down and tell him your concerns…and ask for honest answers. It;s possible he is wondering if he is gay or bi, and worried about the effect on your relationship—-but it could by anything at all, even some bad experience in the past. Oh, and please promise him you won’t be judgemental. And feel free to PM me, if you wish.