Everyone here who isn't contributing needs to shut up and get the f*ck out of the forum. The OP is asking a question, not to be judged. I'm looking at you, toknow, you ignorant twit. Starnique, you're a close second here.
learning1, if you're not sure, ask. Relationships are about communication, and if you're only 6 weeks in and already on different pages, then long term the chances of success are slim to none. Don't make it a big formal conversation, just ask him if he considers your relationship "exclusive", because you would like it to be. It is that simple.