How to suggest moving things further?

There’s a guy I’m super interested in and I’m pretty sure he’s interested in me too but I can’t tell for sure if he is or if he’s just having a little flirty fun. I want to move things along but I don’t want to jump the gun if he doesn’t even think of me like that. Any advice on how to suggest making the next move without being too blatant about it?

Ps our current relationship is just friends, we have a lot of banter and when it’s just us two alone it gets flirty in a playful way.