Why??

Why do I think of him n have a smile on my face?
Why do I, at times, think of him and just can’t stop thinking?
Why do I have to urge to call him or at least SMS, but still don’t?
Why do I have expectations from not anyone but him?
Why do I get angry with him but no one else?
Why don't I grow tired talking about him?
Why am I jealous when he mentions the other girls?

Why do I wish he be with me, always, and still don’t want him to be tied up coz of me?