Obsession?

Theres a boy. He's ALWAYS in my head. I can't sleep, i can't eat, i can't do anything without him being in my head. I sit on facebook all day waiting for him to come online and if he dosent talk to me i get angry or paraniod that hes talking to some other girl that has a better change at getting him than me. I get jelous when i see him with other girls. If i see him around town with someone i will follow him untill i see what there doing. And if he's on his own, i'll watch him or run up and say hi.
I keep coming up with all of these un realistic senarios in my head that would never happen but i always hope that they will. I feel so sad, like theres nothing to live for when im not with him/talking to him and when im with him its like one of the best feelings ive ever had. Worst thing is, i've only known him for two weeks. The first time i saw him my heart sunk into my stoumach and i nearly passed out. He's perfect.
If someone asked me what he is to me, id have to say hes happiness. He's my life and i barley know him.
I need to know if this is an unhealthy-obsession or if this is just some kind of 'fake love' i guess.
I feel as if were ment to be togehter. like he's my soul mate. I tell myself i wont stop untill he's mine, but i dont know if that will ever happen. Please, help?