Why does my boyfriend seldom send me messages or chat on qq, but just call me every night? I wonder what he means.

It doesn't mean anything! I am a boy and seldom send messages to my girlfriend. I don't think that means anything. For example, I just don't like it so complicated. I only like to talk face to face with my girlfriend when I have something to say. Sometimes it's not clear on the phone. This is a personal problem, maybe it's your own. Are you introverted and seldom talk, so your boyfriend will receive "grace" and "good" when chatting with you. And the reason why he works or studies! It would be nice to be more considerate between two people.