After the "Be Our Guest" number, Belle goes to the West Wing where she finds the enchanted rose. But the Beast appears and scares her away, angry that she might have caused another petal to fall. Yet, just a few minutes later, the Beast saves Belle, who had fled with her horse, from the wolves.
So he just told her angrily to go away, yet he followed her through the magically snowy forest just in time to save her. Why?