This question seems to be incomplete. However, there is enough information to find the right answer.
Answer:
The queen is saying that she wishes that Hamlet´s odd behavior is caused by him being lovesick because that would mean that he hasn´t become hopelessly insane, and he can still be cured.
Step-by-step explanation:
In "Hamlet," by William Shakespeare, when Claudius orders Gertrude to leave, she agrees but tells this to Ophelia before leaving, as an honest hope but also kind of like a warning, because they are all trying to understand Hamlet’s weird state of mind, and some people suspect she might be the reason behind it.