Help ! Wife not loving or caring me even after all sacrifices n not saying a single word in complaint ?????.?

Friends particularly ladies : I am 42 n married for 17 yrs. I hv a 16 yr old daughter n a 11 yr old son. My wife is doing all household work for the family but she don't love me in day or night. Despite of providing them all comforts and helping them in all possible way with n crisis of money or family issues, ahe still dont loves me. I am thrown out of bed or face a fight if I go to her. I never complain for anything to save the family but feel duped when I am fulfilling all the needs why I am behaved like so ? Since our marriage she is always suspicious about females. If I talk to a female with smile she thinks I have an affair or may develop an affair. If I get a call from any professional colleague n she picks up the phone she responds rudely n again creates a scene. She is maintaining all the relations with her relatives of meternal side on phone/visits/inviting them and ignores n scolds mine. She has made me cut off totally from my father mother brother n sister n have warned me to face dire consequences if I ever speak or meet or help them in any way. I can not talk/mix to my family n she is free to maintain all relations. She even suspects the wife of her brother if she calls me, my wife insults me before grown up kids I feel bad n have said many times I have no affair with anybody but she tries to make me a culprit. She is not satisfied with her marriage n looks for other relatives who have more wealth or comforts than me. I earn quite well to fulfill all the needs of family in a decent way with a nice respectable job. I am highly hungry of sex as I am unable to control my drive n found an easier way to see porn n masturbate, read erotic stories n masturbate, go to home very late without any work, sits in office for two hours after its closure just to delay to go home. Wife moulds the children that ur dad is not a good man he has done nothing for me in his life, I keep silence as debating the issue will flare up and convert to fight which at many instances has been. Also my in laws are living very near to us n have a regular influence over her daughter. I bear all that for sake of my children n happiness of the family as the children are grown up n I must focus on their higher education n settlement. I am like a currency printing machine n have no personal or social life. I cannot go to any friend or relative or persue my hobby n be like a servant for her. My father n parents are very nice n adjustable to whom she has stopped all relations for very small things they have given their best to us but have not even got little respect from this women. (Her mother has also done the same to her in laws). Now I have written too much. I ask for sincere advices from couples specially what should I do to maintain a peaceful loving family life and get my wife in bed n in my life as a loving partner. We hardly talk to each other only fulfilling our daily routines silently. When I try to talk to her she opens any topic n talk becomes hot n converted into quarrel. I avoid talking her. I am so depressed n think of any other female in my n let her be at her wish. Am I right. Please suggest n save my married life. Your frank n wise suggestions are welcome.