Be very clear; that person is your EX. They are no more to you than any other acquaintance.
If your EX shaves his/her head, marries a frog, dresses in strings, So What? If you don’t say anything, no one will know, (who doesn’t already know) that this is your EX.Further try NOT TO KNOW anything about your EX.Sure, you’ll hear the gossip, the rumours, someone will drop a hint. Fine.But you don’t have to run three searches and scour Facebook for bits about him/her, do you?