Boy problems lol please help??

This guy and I have been like a thing for a while now and all my friends tell me that he's a little f*** boy and he is but being me I always try and see the good in people. Im super naive and I hate it. Today I asked him what we are and he replied sarcastically saying "I thought you liked so and so." This boy always thinks I like other dudes when I constantly tell him that I don't and he doesn't believe me which frustrates me so much!!!! We aren't even together and we already get into fights about really stupid things. We only hang out and he never takes me on dates or out to dinner or anything sometimes he will just blow me off (LOL). I just feel like I am wasting my time with him. Maybe I expect too much. I just don't know if I should let go of what I think we have or keep on trying and hoping we will be something in the future.