Getting someone to text you first is not the same as getting someone to approach you at a bar. You can’t make googly eyes at them or smile subtly. You have to have a lot of patience and take a risk.
1. Do not text him. Your initial reaction to not hearing from him in a few days might be to reach out. But likely this is exactly what he wants. He wants to know you are thinking about him without him having to put in any effort at all. The same goes for tagging him in memes, Snapchatting, and everything else.