Does he really like me, or just miss having a girlfriend?

Me and my current boyfriend have only just got back together (we have a lot of history spanning over about 6 years, its never really worked out properly cos of distance but now we're both a bit older its easier to travel. I'm 18 and he's 21) but i'm already having concerns.

I'm worried that he just misses having a girlfriend, and that he just sees me as a fallback option.

before we got together he was saying how he needed to get himself a mrs cos he hates being single and today he mentioned that he's missed having lazy days cuddled up to someone with a dvd on

I know its not much and i might just be reading too much into it but i can't help wonder

I dont want to get too attached incase my worries turn out right, i know i like him, i'm just scared to let myself fall for him again