What do you do

What do you do when you love someone so much you miss them 10 seconds after they leave?
what do you do when you want to spend all your time with someone, but know you can't?
what do you do when you can't see the person you love when you need them the most?
what will happen to me if i can't see him?
when im away from him, i feel like crying....
does this mean i am really in love?