Why would he stop talking?

Most men are like this once you get to know them really well. My ex husband does the same. He just barely answer's the question. If I ask him something by text even, he doesn't even bother to spell it out he just puts 'K" in small letters....I hate it. Men do not know how to communicate. He needs to talk more and you need to tell him that or else he will never know how you feel. Good Luck