What’s going on with him?

My bf hasn’t texted me all day. Which is not like him. I don’t know if I’m just over reacting or something but it’s getting me kind of anxious. I don’t know what to do and it’s worrying me. He’s kind of been acting like this all week and just ignoring me basically. I don’t know what to think anymore

Edit: We are long distance btw. And we would text through out the day and talk every night. And now it’s just... different.