No, you're not wrong. He can't have the "perks" without the commitment.
You're right in needing to know what this "relationship" is all about. Is he planning on being monogamous? Or is he going to keep seeing other people? Does he really want a relationship? Is he ready to commit? Does he see a future with you? Does he love you? What does HE want in a relationship? What does HE expect of YOU? Would he get upset if YOU saw other people?
You need answers to these and I'm sure more questions. He can't keep leaving you hanging. If he's not ready to commit, you need to know now so you can move on to someone who is. If he's going to keep seeing others, you need to know now, so you're not hurt when you find out he's cheating. He might as well tell you upfront that he's GOING to see others, instead of doing it behind your back.
So have a serious talk with him before you have any more "intimate interludes" with him. Like I said, he can't have the perks without a commitment. Best of luck and God bless. And please keep us posted, okay? Take care! Hugs, Lee