Advice please

I am 30 and my fiancé is 33. We dated for several years, broke up for 2, got back together last year and got engaged.

What makes me wonder is, my fiancé never initiates any sex or intimacy between us now.  I am always the one that has to bring up the topic or initiate it. We barely even 'make-out'.

I don't want to but I'm really starting to think there's more to this than he's letting on.

Has anyone had a similar experience?