HELP! Why didn't he text today? Lost of interest?

I met this guy last semester in cl and we are both eighteen. We clicked right away and he started to chase me at first. I was really nonchalent then I started to like him. Then we texted EVERYDAY, and started to hanged out. He use to text ms all kind of random questions and was very into me. We started to be Fwb (I know now that it was a BAD MOVE WHICH I REGRET NOW) we had ual activity last week, then he became very cold and distant. We still texted everyday, but everytime we had plans he blew me off abd promised to make it up to me. So yesterday we were gonna talk about our cles together since we start next week. He told me that he was busy and his battery is low so we will chat tmw. I was cool with it but he didn't text at all today it's almost 11Pm and I didn't want to look desperate to text now. So, I'll swear until tmw, can someone PLEASE Tell me what's his deal? Thanks because I like him!