The quote humorously addresses encounters with an ex-partner. "Why do people like to tell you they ran into your ex" refers to the tendency of others to share such encounters.
"Unless you ran into him with your car" adds a humorous twist, suggesting that the speaker would only care if a literal collision occurred.
"I honestly don't care seriously" conveys the speaker's indifference and lack of emotional investment in such information.
In essence, the quote playfully highlights the triviality of such updates. It conveys the idea that post-breakup interactions hold little significance. It's a reminder that some things are better left in the past, showcasing a light-hearted attitude toward the curiosity of others about personal relationships.