My boyfriend said he had something on his mind and wanted to be quiet. I said, if you don't mind, can you talk to me? Then he never replied to me. What does he mean?

The other party means that it is not convenient for him to talk about this matter with you now, for fear that you will misunderstand or treat you badly, so he didn't reply to you.

But there may also be a possibility that his relationship with you is not as close as you think, so some things are not suitable for you to talk about. The so-called dirty linen in public, that's why.

So you shouldn't be too active now,