The simple answer is: Don’t. Don’t talk to him about the status of your relationship. You already know it. You just don’t like it. 😉 The two of you are hook up buddies. That’s it. He was ready and you were willing.
Bringing up the relationship status, which you both already know, will appear needy, and besides, guys HATE “the talk”.
Let me know if you have any other questions. 😉