I really like a guy but I can’t tell him…

So about a week ago I met this guy on Tinder and we went out on a date. It went really well but I thought I didn’t feel anything romantic for him. A couple days later I told him about it, and he was totally cool with it. We still talk like we’re really close friends despite just having met lol. Anyway, a couple days later, I really started to think about my decision of telling him what I thought was true. Turns out, I think I really have a thing for this guy. I really don’t want to mess with his emotions and tell him I like him right after having dumped him. I was really stupid to dump him but I can’t stop thinking about him, my heart jumps whenever he texts me, all that cheesy stuff. I’m really not sure what to do about it. Please help!!