How do I ask if we are exclusive?

Hey ladies, so I've been dating this guy for about 6 months now and we haven't talked about our relationship status yet. I want to bring it up to him in a nice way but I'm not sure how to ask. I know I may not get the answer I want but I feel like I need to know where this is going and if we are on the same page. How should I bring it up to him? Should I do it in a public or private setting ? If he wants to pursue a relationship with me how should he react? Thanks for your answers :)