There's this guy who ruffles his hair up all the time when I see him, and it looks like he's got sex hair. Sometimes he talks to me, and I like him, but hes in year 10, and I'm in year 7.

Well, the hair ruffling could just be an itch, a twitch, or just whatever else that you're reading too much into. Could be lice for all we know. I wouldn't think much off the hair thing.

Seems he's nice enough to chat with you, and he might like you as a friend. But if you really want to know if he likes you, likes you, then you have to ask him.

Do you think he might be too old for you? That depends on what you want to do, and where you are. In many parts of the world, you'd be too young to do anything more with him than maybe a kiss. Even less in much of the world, actually. So if you think you'd want to go out with him and do some adult things, then yes, he is probably too old for you to do it legally. But if you want to get to know him, maybe hold hands, then that's just fine.

But first thing's first, you have to figure out if he likes you. That means talk to him more. Hang out with him. Then ask him if he likes you in that way. If he does, then you can proceed from there. Good luck!