Relationship issues!

Okay so I've been talking to this man, he refers to us as being in a relationship. He hardly hangs out with me because he is trying to save money.(which is cool) it really bothers me that he's never there when I ask him to be. In the beginning I told him i wanted a relationship and I told him I didn't think we were on the same page, he said that we were in fact on the same page. But now I stopped asking him to hang and he asks me now and again to hang but we only talk and have sex. Is he using me? I feel like I'm being so dumb!