Is my boyfriend using me?

Jon and I were together for almost 3 years, then he broke up with me because he said that he needed some space, and was having family problems. I didn't understand, and was very hurt (he is my first BF). Then after we broke up, (there was 3 weeks of no contact) and we started talking, going out together, and eventually had together. We still go out and have fun, and talk like we are together (if we had the label we would be going out for 4 years). However, I asked him if we were together the night before: he was silent, and then looked a little sad. Then he said we have a relationship?? Not an FWB or a BFGF, a relationship of some sort. He told me we cant go out because Im too immature, (getting my BA in ACC live with hard core dad). He said he was looking 4 a mature person (Im 21 he's 27). Then said he is not looking for anyone, but waiting for me...I dont know what to do