I've actually left a couple dates early on with a, "Thank you for meeting with me. I apologize, but I'm just not feeling a connection. I hope you understand." The guys were very chill about it. Usually they aren't vibing back either, and it's nice for both of us to not pretend for a whole dinner or whatever. Mutual respect goes a long way. EDIT: If you were curious, the first date was with a 19-year-old. I don't know what I was thinking, but we were just worlds apart in where our lives were. Not even being able to take someone out for a glass of wine is just weird. The second was with a guy who showed up REEKING of cigarettes. Like, this guy clearly smoked constantly.