Tell them or is it meddling?

Moriah
If you had someone that was in a relationship flirting with you (sorta🤔) would you contact their S/O and tell them or just think it's meddling and leave it alone because you weren't trying to do anything in the first place?
-Someone I went to high school with messaged me after seeing a aggravated status I put up. Here's the convo 👇🏼