Why do you think he doesn't text me?

There is a guy I have a crush on for some time. For some time he didn't show any interest in me. We became closer and he showed interest. He kissed me (peck). But then we didn't see each other often and he didn't text me at all. I thought he wasn't interested. After few weeks he asked me out and I said yes. And from what he told to my best friend he wanted to ask me for some time but he said he couldnt find right time when we were alone and he was busy with graduation. So he asked me out and we agreed he will text me when etc. He texted me two times but I couldnt go cuz I was busy. But he only texts me when we go on a date. Just about a date. He doesn't text regurely like whats up and talk about usual stuff, hobbies etc. It is weird. What do you think?

Why do you think he doesn't text me?
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