Hi, sometimes a crush is just a crush and nothing more. It is just a one sided relationship, just your side. If you try approaching this guy and he shows no interest in you, do not pursue it any further. You will only get your feelings hurt. If he is interested in you, believe me he will come after you. Take Care!
He will ignore you as much as he can
This is just a beginning. You can't get any idea about his feelings. You should try talking with him and try to hang out with him more often. If he is interested, he will pay more attention, otherwise he will ignore you.