What I might say, if we ever talked about stuff like this

I am always excited to see you. I am always happy around you. If I stay over Sunday night, I glow for half the day on Monday. You are sweet, and fun, and crazy. Like everything else that makes me happy, I want to see you, hear from you, all the time. I am trying so hard to be good, to do this right. I don't want to scare you away. I know this isn't anything serious. I know you're just having fun. I mean, that was kind of the point. That was what I was looking for, I'm just not very good at it.