A lot of men comment "you're mysterious, there is something your not telling me" " put something in my ear" " did someone hurt you" " I want to know more" "let me know something". What would cause these comments? Certain topics not discussed what?
Maybe you have a quiet manner or seem serious - If you are shy or tentative, some guys assume something has happened in the past - My own view is wait for the girl/woman to tell you if something is up even if you feel there is something in the background - I definitely wouldn't broach the topic early in an relationship but after a time if I had concerns I might explore more in my communication with her. It is one of those things for me that if it feels right I might talk about it but there are no standard signals just a feeling you get. Some may be more open to expressing empathy than others and it is up to other person whether they want to respond or not. I have definitely got it wrong in the past where there was nothing big wrong or they didn't want to talk about it but then again a lot of the times I was right. Part of me goes it is okay to be wrong if it means I can help a lot of other times by talking to people but I do get your point if you don't want to talk or have nothing to talk about, it can feel intrusive or people are creating drama unnecessarily.
That's a Libra thing and some other air signs that often practice telling only part of the story, revealing as little as possible... just out of habit if no real reason (as they have suggested). Scorpios definitely conceal facts, as if part of a secret brotherhood or preservation of power (= knowledge), as well as other water signs. If it bothers them = NOT a match and will continue to hound you rest of life, even after you trust/open up to them. No need to change, this is a defense against manipulators that may have manifested itself after being used a few times.
I've never, ever said any of that!! Who is saying that to you? Sounds kind of creepy, like probing, and too personal!! Ok, 'I want to know more', but that was with a close, personal friend, and we trust each other, and she was having issues and I wanted to help but didn't understand all the details of her disagreement with her older brother.
I do use sometimes " there is something your not telling me" when i talk with some girl and her eyes say she is not telling me something that looks important. " did someone hurt you" if talk is going in that direction or she is disturbed, sad... Depends on her reactions i guess... But way you listed things it sounds like some weird way to flirt with someone acting all misterious or lathently horny. Or could be some weirdo i guess. Who knows depends on context...