I could tell on some occasions that my date was completely misreading the situation. I remember a guy I went on five dates with over the course of a month.
Mix it up with gentle, light kissing and touching and then with passionate, assertive kissing and touching.
Pause sometimes to look her in the eye, or to stop kissing and just relax together (without looking her in the eyes) with a hug or just by kicking back in the chair, on the sofa, bed, etc.
You didn’t ruin anything by not going in for the kiss! It was statistically (I math-ed this out) much more likely to occur on a second date, and I was fairly certain by that point whether I liked them or not.
If every first date I went on ended with a kiss, I would’ve developed a strong aversion to dating. It is possible for the other person to lose interest if too many dates go by without any tell-tale signs of things progressing.
I think there was a moment where I could’ve kissed her, but it passed by so quickly. Will she think I’m not interested because I didn’t go for it? If you get to know the real her and she’s as amazing as you thought, that is so great!