Is it normal that some random little boy came up to me and acted like this?

I was at the park listening to my mp3 player and there were kids there. I wasn't really paying attention to them but then this little boy just winked at me for some reason and then came over and started talking to me. Like about his birthday and how he's gonna be 6 soon and I was like "uh huh, wow, cool! Happy birthday" and then he said that he wanted me to have a sleepover with him O.O and then said "I really like girls, I like ALL girls." I was just like, stunned. The teacher woman managed to drag him away telling him to leave me alone and started telling him to remember social distancing rules and he was NOT happy about that like he stood looking really angry. Then eventually when I was going home he waved at me and I waved back and then he blew a kiss at me and shouted out (in front of everyone as well) "I love you!" Is this normal? Is it weird that I feel concerned about this? Or is that normal for a kid to act like that? I didn't even know him. I just have a feeling that it's kind of weird that that happened.
Oh and please don't get the wrong idea! I was just sharing this story that happened to me and was wondering if people thought this was strange.