well I would recall that as a lack of immaturity and maybe you can either try to get your boyfriend to be more mature or break up with him. I'm a guy and i always respond in a mature way.
well I'm a girl and i think its alright i think before he was your boyfriend he was your friend. i don't know but maybe your at a early stage and he is just getting comfortable and still yet doesn't know what to say. just seem fine with it and don't make it seem so big because you know what boys mostly say about us girl "we over react" so if u go " ur so immature" then that just doesnt seem right just take it lightly and just be like "umm nothing really..." or "don't whats up me and your girl not your friend" make sure you laugh ..don't take it too seriously please!