I'm running out of conversation topics, any suggestions?

so, i’m texting this guy i’m starting to like and i have no idea what to talk about. i’m sooo bad at coming up with things to talk about =/
we were just talking about him joining the marines and so, i’ve ran out of stuff to say..
any ideas without me sounding dumb/weird? and i don’t wanna bug him with like a gazillion questions..