From what I've seen here over the years, there's an entire range of reactions. Total denial is at one end, admission at the other. In between there are many other variations. I think it's important to not place much importance on what someone says. What they do is what matters. In your case, my thought is that he loved what you brought to the relationship. That could be any combination from your personality, attitude or that you provided a cover of 'normalcy' for him to hide behind. The other type of love, the desire, wrapping two lives around each other into one, that's not there. He will always have this section of his life that will be a closed door to you. What goes on behind that door you may only ever find out by accident.
Please remember, this is all speculation on my part. I would also suggest you try to detach yourself from him. The chances of finding out the truth are slim and will just hold you back. There's value in the statement, "Whatever he is, isn't for me." Don't get trapped trying to figure out a puzzle in which he is hiding half the pieces. It's also not good to demand certainty before making choices. That's a recipe for stalemate. Very little in life comes with certainty. In your case, I think it's fairly certain that his behaviour is not likely to change much. Is there a risk to moving on? Yes, but there's also the chance for great reward. Trust your instincts. Be well.
