I run a little meetup space and there's a guy who shows up to one of our biweekly book clubs. He invited the club to a film screening elsewhere last week; it was a tiny theater, with only ~10 other people there, but I was the only one from our club who showed up.

He sat next to me touching-arms-and-legs close, then I scooted away a few minutes later. (I liked it, but I got nervous, lol.) He casually touched me during our conversation, gave nudges at interesting things during the film and Q&A. And when someone mentioned our event space, and he did very dramatic and comfortable, “Hey, that’s you” elbow nudges. I think he was flirting, no?

I later asked to walk together to my car since it was night, and at the end he gave a fist bump, which threw me off at first. Now, I'm realizing he was likely soft-launching showing interest in me, perhaps pulling back when it seemed like I wasn't reciprocating.

Well, book club is next week. There's usually some time before or after when everyone chats after. What is something I can do to flirt back and show, "Hey, I'm actually into you too"? Or, how can I ask him out directly?

I am a very late bloomer who needs help with these things. Also very nervous to do this! All help appreciated.

TL;DR Inexperienced chick trying to flirt back/show interest in a guy. How can I?