If he wanted to talk to you he would, and you would be receiving more than – at best – 2 to 3 word responses. If someone cares about talking to you they will be genuinely interested in sparking, and maintaining a conversation with you. They might make it obvious that they’re trying to keep the conversation going, or maybe they won’t – but either way, the conversation is kept alive, and you’re not wondering where you stand.

 

Basically he just want to be alone or doesn't care at all. Everybody needs a little space from time to time, try to understand. Well if it be obvious that he or she doesn't care anymore better leave now or regret what could cum next, right?