Don’t picture that happening?

So my boyfriend and I have been together for 9 months and we are in the younger age range but we have not French kissed or gotten freaky like that AT ALL. Every time we kiss or have every kissed it’s been a peck and just picturing sex with him or kissing passionately seems a little bit weird, with all my other boyfriends it cane naturally but this is a little awkward for me because I don’t see ya ever getting like that. Any advice on how to not make it awkward and slowly ease in more romance in our relationship?