right, you will know if hes the guy if you dream about him kissing you or holding your hand and if you always want to know if hes ok. the guy you love doesn't always love you back, as i have experienced in the past few years, i like the same guy for 2 years and he knew about me liking him which made no difference,
tips;;

-don't dive straight into him
don't accidentally drop your pencil at his desk.
just go with the flow

p.s-- this might not work for you but it is sure working for mee