Not the right thing to do?

me and this boy were together all summer and all the school year up until november when he asked me out. so technically we've only been dating for a month. i know he wants to have , and i think i am ready, i just don't know for sure if i am. i obviously want him to be my first, but is it too soon? i know i want to i just dont wnat him to be like okay that was fun, laterrrr even though it would be his first time too, so i think we'd become closer.. what do i do?