eskie is right, and sex does muddle it, and, really? There is so much unnecessary drama going on here. Rule of thumb and rule for life is and should always be...honesty. Be honest with yourself.
Expect him to be honest with you. Take nothing less.
Relationships are in most people's lives, a Big Deal and not something to be gossiped about and certainly not hidden...for any reason. That is just odd. Amy sounds like trouble.
So yes, Ask Away. Get all your questions answered.
Can you call this a relationship when there is so much uncertainty swirling around it?
Best to you as you get the answers you deserve...