Sex... just sex

So im young not going to say my age though and i have had sex so you know im not relly all that wise in the what comes after i dont men like immediately but like in the next few weeks or months but then again in the beginning i dont think anybody really does. So like me and this other person had sex it was a while ago but it was multiple times over the span of like a year or 2 and i guess it was kind of like a friends with benifits type thing. Can that actually work, friends with benifits, because dont get me wrong the sex is AMAZING but the friendship is also so great and i dont want to ruin that. So i guess my question is after you've had sex with this friend multiple times can you really just be friends afterwards because i dont want there to be any expectations of sex or any other thing like that. I havent seen this person in a few years and weve recently reconnected over social media and we are going to meet up sometime soon bc weve known each other since we were like 7 and its a whole thing but idk. Could what happened before just be sex?