Vision, Perception, and Belief in Act 1

One thing i dont understand is why the King and Queen want Guildenstern and Rosencrantz to "heal" Hamlet if all it is is that he is in love. Just because he is acting differently doesnt mean he is nessicarily crazy. Hamlet is just crazy for Ophelya's love. Love can make people do crazy things especially when the one that you love does not love you back. It Also hurts because you put so much effort into love. So basically i dont think Hamlet is as crazy as everyone thinks hes just having a minor gliche with his love life.