u/Few_Comparison544

I have been split from my ex for a year and a half. We don’t speak and I intend on keeping it that way. He’s been with his current gf for over a year.
Fast forward to about a week ago, I see his profile on tinder. Doesn’t show an active status, shows he’s 27 miles away which is closer than “where he lives.” Today, I see his profile again! 18 miles away, recently active. I know people who are friends with his currently girlfriend and ask if they’re still together. To which it sounds like they are.
This leads me to my question, how would you go about telling the current girlfriend? (Yes I have proof of the account). Would it be worth telling her? Any advice is appreciated. Thank you!