Why is he acting so weird?

theres this kid i like and everyone thinks he likes me back. he shows all the signs for it to. well weve been texting and flirting non stop, and then he took me out to the movies and we just talked the who time and flirted. it seemed like we had a good time. he texted me that night and asked if i had a good time and he said he would want to hang out again. he said he was free saturday but when saturday rolled along he never texted or called me. but that was okay because i was busy. i texted him and we talked but it wasnt as flirty as usual, but he said he would like to hang out with me the next day at 5. well he never texted me that day either. he pretty much has stopped talking to me since. i dont get it. all the other times we have hung out he said he had a great time and couldnt wait to hang out again. why is he like this??