Trust me, just pretend he doesn't exist either. Me and my best friend got in a HUGE fight! I started shunning her, so then she shunned me. I have great will power, so this "fight" lasted over two months. Eventually I caved in and I couldn't handle it any more. I wrote her a note that said "I'm sick of this! Let's just be friends again" And we were! Okay, usually they arn't THAT long, but it works.
But remember, only use this as a last resort.
=)