Why can't i stop thinking about him?

I rlly can't. wake up and wonder if he's awake yet. i listen to y back and think of him. i hear tapping and think of him (he's percussion). EVERYTHING reminds me of him. for fricks sake, i saw something rlly pale and thought of his skin. it's starting to rlly bug me, expecially when i see him and i have to remind myself how to breath and act normal. a month ago i emailed him, and he emailed me back and my heart stopped functioning right for so long i was worried about myself. in fact, about 7 hours later i still feel like that. i sit next to a guy with ihs name, and when somone talks to him with his name i have to turn and look to see what they were talig about. how can i make myself stop thinking about him, and why do i??