Why haven't I heard anything from him?

I met a guy about a week ago and gave him my number 3 days ago. I heard he was excited to talk to me but he only text me a few times the day I gave him my number. I know I didn't say anything to scare him away and it's kind of odd since he was so excited to get to know me. What's going on?

So I texted him and told him the books were waiting on him if he wanted to borrow them and he replied "haha yeah id like to take a look at em" and I told him if he wanted to come get them he could but I haven't heard anything back. What am I doing wrong?!