conversation starter

I WANT THIS GUY SO BAD!!!!! We went on a date, had sex, he texted me 2 days later then the conversation kind of just stopped... I want to text him, but I don't know what. I'm going away on Saturday and won't be back before next Friday, should I ask him if he wants to do something the Saturday after I come back? When and how should I ask? I'm so attracted to him, I don't know what's wrong with me hahah, help..