Someone missed the lesson from a few secrets down.
"I am 16" isn't something that happened, it's something that is. And, as Cynic said, it's not true, otherwise, you wouldn't have even wrote it, especially as an opener.
I didn't even read it all. Just caught where you agreed to him that this is casual, then scrolled to where you predictably asked if there's anything more, if he's into you.
That's not a question that someone who agreed to be cool with casual asks.
Here you go: no, you're not cool with casual, you lied, and absolutely no, he's not at all into you. And, you're not allowed to be upset about it whatsoever. It's the pill that you have to swallow for bullcrapping about your own intentions. But, if he were into you, you would know it, it'd be obvious, and you wouldn't need to ask.
People only care about themselves, and that's it. Even if someone gave a crap about you, it's only to serve their own purposes until something better comes along. Human beings are truly disgusting, and should probably be the last things you seek for any kind of dependence regarding. . . well, anything. . . including basic companionship, and certainly never anything so complex as selfless love or care. Effing crap doesn't exist.
I know I did not succeed. Hence the title. Tried. Tried, and, failed.