Well, what's more important to you, this guy or your best friend? Is your best friend interested? You realize that if you start pursuing this, whether it works out or not, your relationship with your best friend is over. First thing to do is talk to your best friend. Also, the guy may just like your best friend better. You know how this guy will notice you? Date somebody else! If you're just waiting around for him, it's unlikely he will notice. Start dating. If you start dating others, you'll get over him. There are lots of fish in the sea.