【Fond】 ,  【infatuated】 ,  【besotted】 ,  【insensate】  are comparable when they mean made blindly or stupidly foolish (as by passion or drink).

【Fond】 implies a judgment misled by credulity, undue optimism, or excessive affection.

【Infatuated】 implies a weakening rather than the absence of judgment, especially under the influence of violent passion or unreasoning emotion; it is therefore correctly applied to the acts or qualities of men from whom sagacity or self-control might have been expected.

【Besotted】  adds to  【infatuated】 the implications of a stupefying or intoxicating influence that destroys the capacity to think clearly and sometimes makes its victim disgusting or repulsive.

【Insensate】 conveys the idea of feeling and judgment lost under the influence of such passions as hatred, desire for revenge, rage, or greed; the term is also applicable to the passion.