I have a really good friend who I think might be into me. He's very tactile and flirty and I like him. The way he is with me he isn't like with anyone else but as far as I know we're friends and nothing more but I know if either of us were dating anyone we'd have to change our behavior immediately because it's quite honestly inappropriate at times. We've not done anything but it's encroaching on abnormal for friends and it will become a problem later. A guy has asked me on a date and I am considering turning him down because my relationship with my friend would change but I know that this can't continue. But I know I could lose his friendship anyway by asking what is going on.
How do I start this conversation, knowing what I risk losing?