Okay, so I met this guy last year and immediately took interest in him. I found that some of my new friends had also gone to his school and was tempted to ask about him. Though, as the year went on I began to notice he would speak to me more. He always took interest to whatever was on my desk (I brought my school's art work projects to that class) and he always had some plain reason to speak to me.

Even once when I was talking to another guy across from me (the one I like has an assigned seat by me) and he randomly takes out his homework and offers to let me copy his. I suppose he knew from the worksheet on my desk, but it seemed sort of sudden and out of place to do that out of the blue.

So, the question I'm asking I guess, is how do you know for sure that he likes you? Or has taken an interest in you? What are the signs?

As long as you aren't already taken and neither is he then ask him over to your house for a coffee, or something, hell soon let you know if he isn't up for it.

After school I mean.

The first sign is he asks you to do something with him, or responds positively to you asking him to do something with YOU.

I think if this has been going on for a year, and you haven't been responsive, and he's still trying, this isn't so much about the signs you should look for (they're right in front of you), but what signs you are giving to him yourself.

Why don't you just pass him a note in class if you are interested, and ask him if he'd like to go for coffee after school. If you aren't interested, do nothing. Eventually he'll get tired of trying.

Well,you sort of just know from the vibes he's giving you,if he's interested or not.

You can keep waiting for him to make a move or take matters into your hand by showing more interest in spending more time together,initiating more contact from your end,overall displaying an interest.

Else you can just ask him out for a coffee/soda directly yet casually and see how things go from there.