I might sound shallow but I need advice HELLLLLLLPPPP

Me and my boyfriend have been dating for a little bit. He is so inlove with me, caters to anything I want and need. The sweetest and most amazing guy. Of course he's a few years older and talks about how when we can, to marry me and have children. The thing is he doesn't have much ambitions I mean he is in school to but Not doing to well. Also his eating habits are terrible I mean he's a little chubby but nothing terrible. I'm just afraid that I'll take care of myself and what I need to do and he won't. How to I bring this up without insulting him or hurting him?