I thought the same thing of my husband. As it turned out, although he couldn't share his feelings for me the way I wanted him to, he had other ways. His love language for me was to do things for me. Like he couldn't say, "I love you", or voluntarily give me a hug, but he would do the dishes or a load of laundry without being asked. That was his way of showing me that he loved me. I don't know why it was hard for him to show me the way I wanted him to, it just was.