What to say to an ex who asks too much

An ex has been sending me meaningless messages since I started posting Instastories for the past couple of weeks. Not sure why, messages would go around "you look pretty" or "you look happy" etc.

Last week he, being married with kids himself, innocently asked me the question:

"Don't you want to be married, Krist? I promise it's going to make you happier." 
This is not the first time for me, hello I'm in my mid 30s. But I think I want to record my answer here, not to start a debate or matchmaking madness (hello, I'm me) but just in case someone needs a reference to answer such a typical question.
"You know, the young me used to listen and adore your point of view. But now, it's either you've lost your wisdom, or I've grown much wiser