He cut off ALL contact with me!!! He's my best friend.

We've been best friends since 5 months. Saw each other everyday.. went out everyday for lunch and dinner. Knew each others secrets and weaknesses.... Show More

Updates:
Okay one thing I'd like to mention... may be it's relevant... I started seeing other guys, some of them his friends and he got really upset saying I shouldn't be getting so close to his friends.
We had a talk on 'relationships' some time back and he said he doesn't believe in girlfriends! he said they're just to show off to friends and to put an arm around at his age(18).. he'd rather have a special friend. So I don't know what he expected of me