honey,do u love ur bf?
ask him if he loves u!
if he does he will respect anything u have to say...so tell him ur fears.
my gf is the same as u and tells me the same so i tell her i never expect anything to happen,anytime and i will wait for her as long as it takes,until u talk about it,u will never know what hes thinking.i know u wont want to raise the subject but u will just worry more so be brave and tell ur fears!