Sad about this guy....

My friend and I have been having "encounters" with this man, I have more frequently than she has. But he told her that he has feelings for her and told me I was a confidence booster..... I don't know if that has changed but it's driving a wedge between me and my friend. I'm too scared to ask because I feel like mine and his relationship is to fragile to ask if he has feelings for me. And he doesn't know that we know about each other.