Boy advice!

So I have been seeing this guy for 3 months now. But we are not "official" when I am with him I can tell that he likes me a lot always wanting affection and such. About two months ago I took him to a party with me as my plus one - he began to introduce himself as my boyfriend. When I asked him about this the following day he claimed "he didn't know what we are" and "thought that's what people thought we were," so he "went along with it" since then he has been unable to put a name to what we are and it frustrates me! Am I wasting my time with him??? Is he just scared of commitment or do you think this will progress into something worth while?