I may regret this soon

Ok, so I am a female Sophmore in high school and I have a crush on a senior.
I've never liked (or been afraid of) any one this much before in my LIFE, which is why I was desperate enough to come here when I made this horrible decision.

I drew a portrait of this guy, took a picture of it, and sent it through Facebook as a message with no context.
I hardly ever talk to him! Guess I was getting desperate what with him going to college next month while I'm stuck in highschool.

I am told to be a talented artist and do $50-150 commissions and have many prizes, so I'm not too worried about that aspect of it. I'm just worried that I'll scare him away now.

But that's not it- I started regretting sending him the picture a few hours later and when school was let out, I found him and asked him if he had checked his Facebook yet that day.
Don't know what I was planning to say whether it was a yes or a no, but he said he hadn't for like half a year. I replied by saying "DONT" a little too frantically and he started trying to guess why like "did you post pictures of yourself eating babies or something?" and all that. I laughed but I never told him why I didn't want him to check Facebook.
That was the longest conversation I had ever had with him.

I'm afraid he's going to check it now because I said that and be freaked out by it.

Any and all input appreciated. :)

PS he's single so it's not like I'm trying to steal him XD