Should I tell my ex that I'm dating someone new?

We broke up on good terms and have genuinely been friends since. But he sometimes hints and says that he wants to get back with me. I was the one who broke it off. Our relationship was 6yrs long and a year ago I met this new guy (LDR). Would it be better to keep this to myself or not?
Updates
+1 y
Ended up telling him a day or two ago when he hinted again. He's really happy for me and that was that. We still talk everyday like normal.
Should I tell my ex that I'm dating someone new?
Post Opinion