one way to look at the situation would be considering how you would feel if your wife was the one cheating and you were the honest one in the relationship. would you be angry? hurt? sad? what you are doing is not fair to your wife, it is not a sustainable long term behavior. something will go wrong somewhere and a lot of people are going to get hurt. as someone who has struggled with giving sex too much importance in life, i can give you the following pieces of advice:
1. you will never be satisfied with the amount of sex you have in your life. if all you did from the point of waking up till the point of going to sleep is have sex, with the women interchanging every hour, you will still not be satisfied with the amount of sex in your life. why is that? sex is something that feels good and you always want more of it. its like a drug addict, they always want more of the drug. sex is not meant to be a drug or a button you push to get some pleasure. it is meant as a way to get to know your partner and connect with that person intimately. the pleasure is just a bonus. dont use sex as a heroin needle used by a drug addict and keep living your life from one hit to the next. you are misusing the ability to experience sex.
2. what can you do to stop this out of control habit? one approach to consider is being fearful of the consequences of your actions. if you are a religious man, you will agree that God is not pleased with your adultery. am i correct in assuming that? whether you are a christian, muslim or jewish; adultery is forbidden across the board. it is something that God hates to see you commit and you should be fearful of a God who is displeased with your actions. If you are someone who is not religious, the world has a way of dealing out punishment as well. Divorce, disruption of family, dishonor, shame are all things that are examples of this. So try and be fearful of the consequences that will almost certainly befall you if you keep it up.
i am not going to give you an opinion on whether you should tell your wife, but i think you are mistreating her big time. soon enough if you keep it up, the guilt you are feeling now will be the least of your concerns. cause it will get ugly for you. its never too late to ask for forgiveness.