I am married, and my ex-boyfriend often sends messages to say hello. What does that mean?

Generally speaking, it is impossible to forget you, but I won't send you messages often (rational person). I may have been out of touch for a long time. I want to know what your situation is like, just like an ordinary friend. If (an emotional man) will come to you regardless, even if you are married, there is a saying that liking you is meaningless. See what kind of person your ex-boyfriend is; This is rational. Don't worry, he has a limit. .