Unfamiliar boys send me WeChat in the middle of the night and send some funny or comforting jokes. What do you mean?

First, it may be pure concern for you.

Second, maybe he likes you, but he doesn't express his feelings clearly. He will appear in time when he should, and he won't appear when he shouldn't, because he knows you and he knows when you need comfort.

Third, it may be boring, just by the way when you see it.