Boy problems and no idea what to do

I was talking to this guy, he’s 20 and I’m 18, and he seemed really into me always texting me and keeping conversation going. We hung out on Saturday for like 8 hours and he texted me the rest of the night when I got home and the next day. We didn’t go all the way but he went down on me and I gave him head. He said that he wouldn’t just drop me (how many times have people been told that.) He told me he’d be busy for the next week or so but he hasn’t messaged me or anything. He’s liked my posts on Instagram and has seen my snapchats stories. Do I ask him if we’ll hang out again or wait until he texts me that he’s not busy with uni anymore?