Friends with benifits? (fwb) What?

There's this guy that I rly like well he told me he liked me alot at first he made it seem like he wanted a relation ship then he says he wants to b fwb WTF? I'm only 14 so the only thing wev done is made out so how wud tht evn be fwb? But what shud I do? Shud I say any thing to him? What shud I say? And I don't want a buncha crap answers like he's a jerk don't tlk to him don't b friends blah blah blah... Ok well thanks