My husband is a possessive sex maniac

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I have been married for several years now. However, I have some problems for which I need advice. My husband wants and demands for sex every day. Whenever I say no or I cannot for one reason or the other, he hurls all manner of insults to me and threatens to end our marriage. Of late he demanded my Facebook password and is now managing my account. He also started demanding that I come home straight at the end of our church service. I don't know what has gotten into him. I am not sure if this is true love or something else and I don't know what else I can do to please him. Please advise me. {Mercy}