I have no problem getting matches on Tinder and setting up dates, but I have been on maybe 7-8 dates where the girl has declined to see me again for a second date, and I'm honestly not quite sure where I mess up.

I have two theories: It's either because she's physically unattracted to me, despite having seen my pictures on Tinder (I am not tall, which might be a factor). Or it's because I'm messing up during the actual interaction.

I'm honestly not sure how I'm supposed to act on a date in a TRP-way. I'm naturally very smiling and easy to laugh, and I'm afraid this gives off a Nice Guy vibe. I usually talk and ask questions with enthusiasm. Should I tone this down? I've heard a few people mention the fact that you're supposed to look disinterested, how have peoples experiences been with this? I'm afraid of coming off as a boring / stiff type.