I dated online. I can't even answer his phone (it sounds like Cai Ling's). He sent another short message saying that I was in a meeting for a while.

That message was an automatic reply to the rejection of the message. He can't answer your phone now, but he was afraid that your phone could not get through, so he replied by text message. Although I don't know what he is doing, it is not convenient for everyone to answer the phone. When the boss is at work, or talking to colleagues, at school, when parents or teachers are around, or in class.

Don't be paranoid just because he doesn't answer your phone once. This only shows that he was inconvenient at that time, but it doesn't mean that he didn't want to talk to you or didn't love you. See if he will call you.