After approaching and having a good conversation I'd say something like 'you seem like a sweet person I'd like to meet you again?', 'can we hangout again sometime?', 'can we stay in touch?' or 'can we meet again?' to which I get replies like I don't go out that much, I don't meet strangers much, or they'd say ok and we exchange insta accounts but they'd ghost me. What am I doing wrong?