Going home by train in the middle of the night, my boyfriend didn't send a message.

You can tell me why you didn't send me a message when I went back to my hometown yesterday. Let him go if he admits his mistake directly. If he says some excuses, keep watching. Next time you encounter something similar, ask him in a coquetry way. If he has too many excuses, divide it. If it's only once, don't think about it.