I like him, but i don't know how to act. Hope u can help me! please...?

so, i like a guy who studies at the same school i do. i like him and i think he also does - at least i think he appreciates me as a nice person whom it is easy to talk with. he's not shy but quite sublime - i mean, he is reserved and a bit ignorant. i always starts to talk in the internet - he never does. but he answers! i know it sounds stupid.. but i'm completely lost. i don't kow how to "make him fall in love with me". this year we're going to graduate school - this moment is too close. and also this can have an impact on the relationships: he is occupied with preparation for exams as well as i am! but i wanna be with him! i'm quite shy and i'm scared to be misunderstood (he'll be fed up of me if i write to him too often...) help please - i'm not that experienced in making such affairs...