Most Helpful Guy
It means he's still upset and is thinking his next move to either stick it out or give it up or wants to teach you a lesson. I get quiet also if mad enough
Most Helpful Girl
Now I don't know the both of you so this is what I gather from the info given. It could be one of two things. 1.) He meant it in haste and sent it, only you sorry to not come across as a complete a**h***. OR 2.) He did mean it for someone else, and did in fact send it to you by accident. Now he severely regrets it and worries about what you think now that you've seen him in a darker light and mat be wondering what to do next. Either way give it a little time for him. If he doesn't come around ask him about it later, that way he has had time to at least sort some things out.