snapchat thoughts?

ive been snapping this guy for about two weeks, we've only met in person once, and it's been really flirty lately and we're trying to get together a few times before we officially say we're dating so I'm like super super happy he makes me so happy!!! only concern is that I snapped him yesterday and he still hasn't opened it yet (12 hours) and we've never gone this long without talking. it makes me kinda worried but then again his phone could've died or something like that. I know it's petty but it's a concern I guess haha. thoughts?